Browse Topic: Powder metallurgy

Items (732)

Experimental Characterization of Fabricated (310) and (210) Symmetrical Tilt High-Angle Grain Boundaries in Bicrystalline Copper Thin Films Using NaCl Substrates

2025-28-0034To be published on 02/07/2025

A novel sintering method of bridging the two mechanically polished and oriented single-crystals together face-to-face in a non-environmental controlled atmosphere to fabricate the bicrystal substrate of NaCl of macroscopic thickness, with a common zone axis and having planarity over large areas, has been developed. Epitaxial [001] bicrystalline thin face-centered cubic (fcc) metal film of surface-reactive metal-containing tilt grain boundary across the interface is first grown in high vacuum directly by flash deposition on initially fabricated [001] oriented bicrystalline substrate of NaCl. The [001] tilt boundary, thus produced, is examined by electron microscopy to characterize grain boundary morphology and structure. The findings of some preliminary investigations are then presented. A distinct atomic structure is observed for {310} and {210} inclination. Both HAADF-STEM and Diffraction images reveal that such fabricated high-angle grain boundary accommodates minor deviations from

DISH, NILABH, Gautam, Abhay, Behera, Rakesh, Banka, Hemasunder, CHAVAN, PRADEEP

Polytetrafluoroethylene (PTFE) Moldings Premium Grade, As Sintered

AMS3668F (Current)

10/08/2024

This specification covers two types of virgin, unfilled polytetrafluoroethylene (PTFE) in the form of molded rods, tubes, and shapes. This specification does not apply to product over 12 inches (305 mm) in length, rods under 0.750 inch (19.05 mm) in diameter, and tubes having wall thickness under 0.500 inch (12.70 mm

AMS P Polymeric Materials Committee

Polytetrafluoroethylene (PTFE) Moldings General Purpose Grade, As Sintered

AMS3660F (Current)

10/08/2024

This specification covers virgin, unfilled polytetrafluoroethylene (PTFE) in the form of molded rods, tubes, and shapes. This specification does not apply to product over 12 inches (305 mm) in dimension parallel to the direction of applied molding pressure, rods under 0.750 inch (19.05 mm) in diameter, and tubes having wall thickness under 0.500 inch (12.70 mm

AMS P Polymeric Materials Committee

Development of Robust Traction Power Inverter Residing in Integrated Power Electronics for Ultium Electric Vehicles

2024-01-2211

04/09/2024

General Motors (GM) is working towards a future world of zero crashes, zero emissions and zero congestion. It’s “Ultium” platform has revolutionized electric vehicle drive units to provide versatile yet thrilling driving experience to the customers. Three variants of traction power inverter modules (TPIMs) including a dual channel inverter configuration are designed in collaboration with LG Magna e-Powertrain (LGM). These TPIMs are integrated with other power electronics components inside Integrated power electronics (IPE) to eliminate redundant high voltage connections and increase power density. The developed power module from LGM has used state-of-the art sintering technology and double-sided cooled structure to achieve industry leading performance and reliability. All the components are engineered with high level of integration skills to utilize across TPIM variants. Each component in the design is rigorously analyzed and tested from component to system levels to ensure high

Nassiri Bavili, Arash, Basher, Korobi, Chung, Sung, Alam, Khorshed, Lee, Jung-Gi, Choi, Hong Goo, Ko, Jin-young, Anwar, Mohammad

Effective Utilization of Pt Catalyst in Three-Way Catalytic System by Employing Calcined Ceria with Alumina

2024-01-2133

04/09/2024

To satisfy the stringent regulations for exhaust gas emissions from gasoline-powered vehicles, large amounts of Rh and Pd have often been employed in three-way catalysts (TWCs) as the main active components. On the other hand, Pt-based TWCs are not often used in gasoline vehicles because Pt is readily sintered by its exhaust gases at approximately 1000 °C [1, 2]. In general, Pt-based TWCs must be located away from large thermal loads to maintain the active sites for gas purification. Based on this background, we previously reported that employing a small amount of CeO2 calcined at 1000 °C (cal-CeO2) in Pt-based TWCs was one of the most effective approaches for improving the catalytic activity without increasing the amount of Rh and Pd [3]. The effect of cal-CeO2 was attributed to the higher redox performance and Pt dispersion derived from the strong interactions between Ce and Pt. Therefore, the resulting Pt-based TWCs exhibited high catalytic performance, despite the low specific

Morita, Itaru, Tanaka, Hiroki, Saeki, Shohei, Isayama, Akihiro, Iwashina, Katsuya, Nagao, Yuki, Endo, Yoshinori, Wakabayashi, Takashi, Haneda, Masaaki

AZ31-MWCNT Composites Fabricated Through Powder Metallurgy for Aerospace Applications

2024-01-1938

03/05/2024

The aerospace industry's unceasing quest for lightweight materials with exceptional mechanical properties has led to groundbreaking advancements in material technology. Historically, aluminum alloys and their composites have held the throne in aerospace applications owing to their remarkable strength-to-weight ratio. However, recent developments have catapulted magnesium and its alloys into the spotlight. Magnesium possesses two-thirds of aluminum's density, making it a tantalizing option for applications with regard to weight-sensitive aerospace components. To further enhance magnesium's mechanical properties, researchers have delved into the realm of metal matrix composites (MMCs), using reinforcements such as Alumina, Silicon carbide, Boron carbide and Titanium carbide. However, meager information is available as regards to use of Multi-Walled Carbon Nanotubes (MWCNTs) as a reinforcement in magnesium based MMCs although, CNTs exhibit excellent stiffness coupled with very low density

Mukunda, Sandeep, Boppana, Satish Babu, Chinnakurli Suryanarayana, Ramesh, T, Aravinda, Khan, Saleem

Steel, Corrosion-Resistant, Bars, Wire, Forgings and Forging Stock 17Cr - 0.52Mo (0.95 - 1.20C) (440C) Powder Metallurgy Product, Hot Isostatically Pressed

AMS5899D (Current)

03/01/2024

This specification covers a corrosion-resistant steel, consolidated by hot isostatic pressing (HIP) product from prealloyed powder, in the form of bars, wire, forgings, and forging stock

AMS F Corrosion and Heat Resistant Alloys Committee

An Investigation into the Heat Deformation of a Powder-Metallurgical Iron- Aluminium-Chromium Alloy

2023-01-5128

02/23/2024

Powder metallurgy of 3065IS temperature and strain rate were only two of the variables used to investigate the higher permeability of an iron alloy. A strain rate vs. stress plot revealed a critical value. This demonstrated that the functioning of the alloy was comparable to that of other materials in its class. We used a transmission electron microscope to examine the microstructure of routinely twisted materials to determine particle characteristics and precipitate distribution. This allowed us to gain a better understanding of the internal workings of materials. Using constitutive equations, we investigated the link between temperature and stress. This study's findings were incorporated into equations describing the material's high thermal behaviour, and a modified version of the cosec equation was used to analyse this reliance. Effective stress was defined as the distinction between actual stress and a present limit. It has been shown that the presence of ferrous particles and

Francis Xavier, J., Sambath, S., Jayabalakrishnan, D., Suthan, R., Zahir Hussain, M.

Investigation of Wear Performance in Zirconium Dioxide Reinforced Aluminum Hybrid Nano-Composites Synthesized by the Powder Metallurgy Process

2023-01-5161

02/23/2024

The wide applications of aluminum composites in the defense, automotive and aerospace industries interest researchers in developing hybrid nanocomposites with specific properties such as high strength, hardness, and wear resistance. The aluminum was reinforced by silicon carbide (SiC) nanoparticles with a constant weight composition, and the spark plasma sintering process fabricated zirconium dioxide (ZrO2) nanoparticles with a different weight composition. The hybrid composite material’s density, porosity, and hardness were assessed using the SEM images of composites and hybrid nanocomposites that were effectively created by the sintering process without particle agglomeration. A pin-on-disc device was used for the wear test, with different input parameters such as weight (20, 25, 30, and 35 N), varying sliding distance (300, 500, 700 and 900m) and diverse sliding speeds (1, 1.5, 2 and 2.5 m/sec). The hybrid nanocomposite hardness increased to 52% of the S4 sample due to the 15% ZrO2

Kalaimani, M., Tajudeen, Shaafi

Road Tires Use inAgricultural Areas is Possible by Maintaining Soil Biomass

2023-36-0085

01/08/2024

Brazil has a robust agricultural sector; however, the mechanization of crops causes several problems in the physical soil structure, including surface compaction. Compaction reduces crop productivity and producer profits. The intensity of compaction varies depending on the wheelset model used, tire type, water content, and soil load applied. Recent studies have shown that soil compaction in sugarcane can be attenuated by maintaining the vegetation cover (straw biomass) on the surface after harvesting. The present study used different tire models to evaluate the interaction between wheelset-soil as a function of different amounts of biomass left over from the sugarcane harvest. A physical simulation system (fixed tire testing unit) was used for the tests. The wheelsets were subjected to controlled loads on tanks with confined and standardized soil samples. The treatments consisted of 3 tire models (p1: road radial, composed of double wheelset - 2×275/80R22.5; p2: agricultural radial

Filho, Aldir Carpes Marques, Sartorio, Simone D. M., Martins, Murilo B., Lanças, Kléber P.

Simulation applied to compaction process in sintered components for product performance optimization

2023-36-0011

01/08/2024

Sintered parts mechanical properties are very sensitive to final density, which inevitable cause an enormous density gradient in the green part coming from the compaction process strategy. The current experimental method to assess green density occurs mainly in set up by cutting the green parts in pieces and measuring its average density in a balance using Archimedes principle. Simulation is the more accurate method to verify gradient density and the main benefit would be the correlation with the critical region in terms of stresses obtained by FEA and try to pursue the optimization process. This paper shows a case study of a part that had your fatigue limit improved 1000% using compaction process simulation for better optimization

Nunes, Eduardo, Colosio, Marco, Rodrigues, André Luiz, Duarte, Alisson

Can Road Tires be Applied in Agriculture

2023-36-0086

01/08/2024

The mechanization of crops causes problems in soil structure as it causes compaction. Compaction can be severe depending on the type of tire adopted in the field. Producers are concerned with selecting wheelsets that harm the soil less and remembering to save resources when buying agricultural tires. Agricultural tires are more expensive than road tires, and truck tires can be an alternative for producers to save money. The present study evaluated the interaction between wheelset and ground in a fixed tire testing unit, comparing the impact of different tire models on bare ground. The 6 treatments performed consisted of 3 tire models (p1: road radial, composed of double wheelset - 2×275/80r22.5; p2: agricultural radial - 600/50r22.5; and p3: agricultural diagonal - 600/50-22.5) versus two contact surfaces, one rigid and the other with bare agricultural soil. Seven response variables were used to apply Regression analysis and descriptive statistics. Agricultural tires applied less

Filho, Aldir Carpes Marques, Medeiros, Simone D. S., Martins, Murilo B., Lanças, Kléber P.

Titanium Alloy, Blended Powder Compacts, Sintered 6Al - 4V

AMS4993G (Current)

11/10/2023

This specification covers a titanium alloy in the form of compacts produced by pressing and sintering a blend of elemental titanium powder and aluminum-vanadium alloy powder (see 8.6

AMS G Titanium and Refractory Metals Committee

A Sintering Method to Fabricate Large Perovskite Devices

TBMG-48938

09/01/2023

A Penn State-led team of researchers have created a new process to fabricate large perovskite devices that is more cost- and time-effective than previously possible — and may accelerate future materials discovery

Aluminum-Beryllium Alloy, Extrusions 38Al - 62Be Annealed

AMS7912E (Current)

06/13/2023

This specification covers an aluminum-beryllium alloy in the form of bars, rods, tubing, and shapes consolidated from powder by extrusion

AMS G Titanium and Refractory Metals Committee

Use of Powder Metallurgy Based Connecting Rod for Diesel Engine Application

2023-28-1352

05/25/2023

The usage of forging a preformed, near net shape, compacted and sintered metal powder has been widely accepted since the eighties and is now one of the mainstays for producing Connecting rods in North America. However, its use in Indian subcontinent is limited as its counterpart i.e. conventional steel forging is still the most dominant. Powder metallurgy route has many advantages like good dimensional accuracy; minimum scattering of weight etc. Despite these advantages, the Powder metallurgy process is still not preferred predominantly due to technical (endurance) and infrastructural limitations. This work envisages combining the benefits of powder metallurgy process with the required mechanical properties viz. tensile and fatigue strength alongside design modifications to meet the requirements of a connecting rod for a 2-cylinder diesel engine. The connecting rods met the fatigue life at the required FOS equaling the performance of a conventionally forged connecting rod

Chatterjee, Pallav, Gopal, Manish, Palkar, Vishal, Kolhe, Vivek M, Kumbhar, Dipak, Ghotekar, Sunil

Development and Performance Studies of a Lightweight AA6061/Ti Particulate Surface Composite through Friction Stir Processing

2023-28-1303

05/25/2023

Surface engineering is becoming increasingly crucial for several automotive and aerospace components that involve intense surface interactions. Friction stir processing (FSP) has emerged as an effective surface modification and hardening technique in recent days. The technique also allows the incorporation of reinforcement into the modified surface to enhance the strength and hardness further. This work applied FSP to develop a pure Ti particulate reinforced AA6061 metal matrix composite (MMC). Six different strategies were adapted (in the form of micro grooves, micro drills on the surface) to effectively infuse reinforcement on the alloy surface. Microstructural changes before and after FSP were studied using SEM and EBSD. Other tests such as post-mortem EDS, XRD, hardness, and compression were also done to examine the performance of developed composite. Microstructural lineaments revealed a more uniform dispersion of reinforcement particles in the matrix when the particles were

Hussain, Ilyas, Immanuel, Jose

Optimization of Operating Parameters of the Asphalt-Paver Vibration-Screed System in Improving Compaction Efficiency and Pavement Quality for Driving Vehicle Performance

10-07-02-0015

05/22/2023

The operating parameters of the asphalt-paver vibration-screed system (AP-VSS) including the excitation frequencies of the tampers and vibratory screed (ft and fs ) and the angular deviations of the tampers (α 1 and α 2) affect not only the pavement quality but also compaction efficiency. Based on the dynamic model of the AP-VSS and the interaction model of the tamper and hot-mixed asphalt, the experimental and numerical simulation studies of AP-VSS are performed to analyze in detail the influence of operating parameters of the AP-VSS on AP-VSS pavement quality and compaction efficiency. The maximum value of the root-mean-square acceleration (ar.m.s ) of the AP-VSS and the maximum value of the root-mean-square compaction force (Fr.m.s ) of the tampers are selected as the objective functions. The experimental and simulation results indicate that by using the AP-VSS design parameters, the pavement quality and compaction efficiency of the AP-VSS are quite low. To enhance the AP-VSS

Xiu, Yun, Li, Anding, Nguyen, Vanliem, Mei, Yundong, Li, Qian, Li, Jianwei

Steel, Bars, Wire, and Forgings 8V - 4Cr - 4W - 3Mo (2.45 - 2.55C) Powder Metallurgy Product Hot Isostatically Pressed

AMS6556A (Current)

05/16/2023

This specification covers a premium aircraft-quality, high-alloy steel gas-atomized and HIP-consolidated in the form of bars, wire, forgings, and forging stock

AMS E Carbon and Low Alloy Steels Committee

Steel, Bars, Wire, and Forgings 9.75V - 5.25Cr - 1.3Mo (2.40 - 2.55C) Powder Metallurgy Product Hot Isostatically Pressed

AMS6559A (Current)

05/16/2023

This specification covers a premium aircraft-quality, high-alloy tool steel gas-atomized and HIP-consolidated in the form of bars, wire, forgings, and forging stock

AMS E Carbon and Low Alloy Steels Committee

Steel, Bars, Wire, and Forgings 9V - 5.25Cr - 1.3Mo (1.80 - 1.95C) Powder Metallurgy Product Hot Isostatically Pressed

AMS6557A (Current)

05/16/2023

This specification covers a premium aircraft-quality, high-alloy tool steel gas-atomized and HIP consolidated in the form of bars, wire, forgings, and forging stock

AMS E Carbon and Low Alloy Steels Committee

Steel, Bars, Wire, and Forgings 10.5Mo - 6W - 3.75Cr - 2V (1.25 - 1.40C) Powder Metallurgy Product Hot Isostatically Pressed

AMS6558A (Current)

05/16/2023

This specification covers a premium aircraft-quality, high-alloy steel gas-atomized and HIP-consolidated in the form of bars, wire, forgings, and forging stock

AMS E Carbon and Low Alloy Steels Committee

Aluminum Alloy, Discontinuously Reinforced Hot Isostatically Pressed Shapes 6061B/SiC/40p (3 μm) (T1P

AMS4368A (Current)

03/08/2023

This specification covers discontinuously reinforced aluminum alloy (DRA) metal matrix composites (MMC) made by mechanical alloying of 6061B aluminum powder and SiC particulate, which is then consolidated by Hot Isostatic Pressing (HIP) into shapes between 12 to 100 square inches (0.008 to 0.065 m2), inclusive, cross-section. Tensile property response to heat treatment has been demonstrated on samples of 1 square inch (645 mm2) maximum cross section (see 8.9

AMS D Nonferrous Alloys Committee

Optimizing the Tribological Process Parameters of Calcium Hexaboride Reinforced Magnesium Composite Using Grey Relational Analysis

2022-28-0567

12/23/2022

Different weight percentages (0, 1 and 2 wt. %) of Calcium hexaboride (CaB6) is reinforced with pure magnesium and the composite is fabricated through powder metallurgy technique. The fabricated samples are used for the tribological evaluation. In this connection, the Taguchi optimization technique (L27 Orthogonal array) assisted Grey Relational analysis is used for predicting the significant factors to the tribological evaluation. The magnesium composite wear rate is evaluated by Archard’s mass loss method. Based on the obtained results, it is observed that the magnesium composite wear rate is increased by the effect of an increase in load. It was arising as a result of enhanced delamination wear mechanism which is confirmed by SEM observation on the worn-out pin surface

K, Kaviyarasan, Parasuraman, Seenuvasaperumal, Ayyasamy, Elayaperumal, Murphin Kumar, Paskalis Sahaya

Hierarchical Diamond-Based Ceramic Composites

22AERP12_0912/01/2022

An innovative combination of experimental synthesis and testing and multiscale simulation techniques explored the effects of hierarchical microstructure (mesoscale diamond packing and nanoscale interfaces) on the mechanical and ballistic performance of diamond-silicon carbide (SiC) composite ceramics. Army Research Laboratory, Aberdeen Proving Ground, Maryland This research developed and utilized advanced processing, modeling, and micromechanical tools to discover and demonstrate hierarchically structured diamond-based composites with exceptional mechanical and ballistic behavior. Understanding how nanoscale and mesoscale microstructural features in diamond-silicon carbide (SiC) composites influenced the physics of failure was critical in uncovering ways to improve performance for soldier protection and discover potential defeat mechanisms. Emphasis was placed on the fundamental understanding of the deformation and failure mechanisms, which enabled the design and development of robust

Powder History Metric and Labeling Schema

ARP7044 (Current)

11/22/2022

This SAE Aerospace Recommended Practice (ARP) describes a method to measure, track, and characterize the history of powder feedstock when consumed in the production of parts via additive manufacturing (AM). The history captured as part of this ARP includes AM process exposure, feedstock consumption, blending, and losses associated with the totality of the AM workflow. This document also outlines a two-part metric schema for used powder feedstock consequential of its process exposure history. This metric schema also enables aligning risk determination and usage practices for used powder when based on a correlation between tabulated values in the scheme and user-identified metrics. These correlated metrics with schema values may also be used when establishing powder blending workflows or identifying end-of-life for feedstock

AMS AM Additive Manufacturing Metals

Plastic: Polyimide for Molded Rod, Bar, and Tube, Plaque, and Formed Parts

AMS3644H (Current)

09/30/2022

This specification covers a polyimide plastic in the form of isostatically molded rod, bar, and tube, unidirectionally molded plaque, and direct formed parts

AMS P Polymeric Materials Committee

Titanium Alloy Powder Titanium Ti-5553 (Ti - 5Al - 5Mo - 5V - 3Cr

AMS4960 (Current)

06/02/2022

This specification covers a titanium alloy in the form of prealloyed powder

AMS G Titanium and Refractory Metals Committee

Titanium Alloy Powder 6Al - 4V

AMS4998F (Current)

05/26/2022

This specification covers a titanium alloy in the form of prealloyed powder

AMS G Titanium and Refractory Metals Committee

Laser-Powder Bed Fusion (L-PBF) Produced Parts, Nickel Alloy, Corrosion- and Heat-Resistant, 62Ni - 21.5Cr - 9.0Mo - 3.65Nb Stress Relieved, Hot Isostatic Pressed and Solution Annealed

AMS7000A (Current)

05/16/2022

This specification covers a corrosion and heat-resistant nickel alloy in the form of parts produced by laser-powder bed fusion (L-PBF) that are subjected to post-deposition stress relief (SR), hot isostatic press (HIP) and solution anneal operations. Parts may require subsequent machining or surface finishing to meet specific application requirements

AMS AM Additive Manufacturing Metals

Metal Injection Molded Nickel Based Alloy 718 Parts Hot Isostatically Pressed, Solutioned and Aged

AMS5917 (Current)

05/12/2022

This specification covers a corrosion and heat-resistant nickel alloy in the form of metal injection molded (MIM) parts

AMS F Corrosion and Heat Resistant Alloys Committee

3D Printable Superalloy

TBMG-4581105/01/2022

Velo3D, Inc. Campbell, CA +1-408-610-3915

Batch Processing Requirements for the Reuse of Used Powder in Additive Manufacturing of Aerospace Parts

AMS7031 (Current)

03/29/2022

This specification prescribes process requirements for batch processing of used, metal powder originating from an existing additive manufacturing process workflow for reuse in subsequent additive manufacturing of aerospace parts in non-closed loop additive manufacturing machines. Such powders may be pre-alloyed or commercially pure. This specification is not limited to a specific additive manufacturing process workflow as the originating source of material to be reused. It is intended to define those procedures and requirements necessary to achieve required cleanliness and performance of metal powder feedstock to be reintroduced into the same additive manufacturing process from which such powder originated. This specification is intended to be used in conjunction with relevant AMS powder specifications and AMS process specifications for additive manufacturing. Unless otherwise specified, powder prepared for reuse following this specification is intended to be conforming in physical and

AMS AM Additive Manufacturing Metals

An Investigation of the Simulation of Sintering Distortion in a 316L Part Manufactured Using Bound Metal Deposition 3D Printing

2022-01-0346

03/29/2022

Metal binderjetting (MBJ) and bound metal deposition (BMD) are high throughput additive manufacturing process that have the potential to meet the needs of automotive volume production. In many cases, these processes require a sintering post-process to meet final dimensions. Because the sintering stage is performed free standing (i.e. without the use of tooling) and can involve up to a 20% dimensional change from green part to the final part shape, part distortion can be a concern. In this study, the sintering stage of a bridge geometry was simulated under different parameter settings using a Finite Element Analysis. The sensitivity of the simulation to various process parameter inputs was examined. Physical parts were then produced in 316L using a bound metal deposition and sintering process and compared to prediction. The sintering simulation indicated good agreement with experiment for some dimensions but highlighted the need for additional analysis

Forsmark, Joy, Markland, Kyle, Godlewski, Taylor, Bai, Yun, Poczatek, Eric

Internal Boundaries of Metal Additive Manufacturing: Future Process Selection

EPR2022006

03/11/2022

In the early days, there were significant limitations to the build size of laser powder bed fusion (L-PBF) additive manufacturing (AM) machines. However, machine builders have addressed that drawback by introducing larger L-PBF machines with expansive build volumes. As these machines grow, their size capability approaches that of directed energy deposition (DED) machines. Concurrently, DED machines have gained additional axes of motion which enable increasingly complex part geometries—resulting in near-overlap in capabilities at the large end of the L-PBF build size. Additionally, competing technologies, such as binder jet AM and metal material extrusion, have also increased in capability, albeit with different starting points. As a result, the lines of demarcation between different processes are becoming blurred. Internal Boundaries of Metal Additive Manufacturing: Future Process Selection examines the overlap between three prominent powder-based technologies and outlines an approach

Slattery, Kevin, Rogers, Kirk A.

Titanium Alloys Production by Powder Metallurgy for Automotive Applications

2021-36-0100

02/04/2022

The use of alternative materials in automotive production can lead to both significant weight reductions and oftentimes functional improvements as well. Titanium and its alloys have unique properties that enable its use in the aerospace industry like its high strength-to-weight ratio, good resistance to many corrosive environments, and can be used over a wide range of temperatures. Despite these high expectations and the numerous advantages of titanium materials, their use has always failed just for a single reason: price. Powder metallurgy (P/M) of titanium and Ti-based alloys may lead to the obtainment of components having weak-to-absent textures, uniform grain structure and higher homogeneity at lower costs (a necessary prerequisite to expand the use of titanium and its alloys) compared with conventional wrought products. In this work Ti-6Al-4V and Ti-48Al-2Cr-2Nb (γTi-Al) were produced by P/M in order to expand the application in automotive area. Samples were produced by mixing of

Henriques, Vinicius André Rodrigues, do Nascimento Filho, Elizeu, de Salvo, João Guilherme Jacon, Galvani, Eduardo Tavares

Low Distortion Titanium in Laser Powder Bed Fusion Systems

TBMG-40411

12/01/2021

Using a layer-by-layer approach during the additive manufacturing (AM) process, laser powder bed fusion technology (LPBF) can produce finished components directly from metal powder alloys with minimal post-processing required. Intricate designs can be realized in the final part directly from printing, allowing for greater freedom of design than when using traditional manufacturing technologies. In some cases, this approach reduces the complexity and number of parts in component assemblies. The powder-to-part manufacturing process, along with the increased freedom of design, makes additive manufacturing a disruptive process compared to traditional manufacturing techniques

Steel, Corrosion and Heat-Resistant, Powder for Additive Manufacturing, 17Cr - 13Ni - 2.5Mo (316L

AMS7037 (Current)

11/23/2021

The intended upper bound of this specification is that the particle size distribution (PSD) of powders supplied shall be <60 mesh (250 microns) and that no powder (0.0 wt.%) greater than 40 mesh (425 microns) is allowed

AMS AM Additive Manufacturing Metals

Sustainable 3D-Printed Magnets

TBMG-3980909/01/2021

From wind turbines and electric motors to sensors, permanent magnets are used in many electrical applications. The production of these magnets usually involves sintering or injection molding. But due to the increasing miniaturization of electronics and more exacting requirements placed on magnetic components in terms of geometry, conventional manufacturing methods are frequently coming up short. Additive manufacturing technologies, however, offer the required flexibility of shape, enabling production of magnets tailored to the demands of the application in question

New Spraying Method for Producing Ceramic Coatings

TBMG-3958408/01/2021

The production of ceramic coatings has only been possible by means of sintering techniques conducted at more than 1,000 °C. A new spraying method called Powder Aerosol Deposition (PAD) enables their production at normal room temperatures. It is therefore highly attractive for industrial applications

Titanium Ti-5553 (Ti - 5Al - 5Mo - 5V - 3Cr) Powder for Additive Manufacturing

AMS7026 (Current)

07/28/2021

This specification covers a titanium alloy in the form of pre-alloyed powder

AMS AM Additive Manufacturing Metals

Eco-Friendly Technique Upcycles Metal Waste into Multipurpose Aerogels

TBMG-39455

07/01/2021

Conventional approaches for recycling metal waste are energy-intensive and some also generate environmentally harmful byproducts such as ammonia and methane during aluminum recycling. To address this challenge, researchers demonstrated an eco-friendly technique to convert aluminum and magnesium waste into high-value, multifunctional aerogels. This upcycling method could be applied to all types of metal waste such as metal chips and electronic waste

Aluminum Alloy Powder 4.6Cu - 3.4Ti - 1.4B - 0.75Ag - 0.27Mg

AMS7033 (Current)

06/22/2021

This specification covers an aluminum alloy in the form of pre-alloyed powder

AMS AM Additive Manufacturing Metals

Gamma Titanium-Aluminide Powder for Additive Manufacturing Ti - 48Al - 2Nb - 2Cr

AMS7023 (Current)

06/01/2021

This specification covers a heat-resistant gamma titanium aluminide alloy in the form of pre-alloyed powder

AMS AM Additive Manufacturing Metals

Metal Powder Feedstock Size Classifications

AMS7025 (Current)

04/22/2021

This specification covers particle size classifications and corresponding particle size distribution requirements for metal powder feedstock conforming to a classification

AMS AM Additive Manufacturing Metals

Oil Consumption Pathway Impact on SCR-on-Filter Functional Performance and Lubricant Derived Ash Characteristics

2021-01-0578

04/06/2021

SCR-on-filter, or SCRoF, is an emerging technology for different market segments and vehicle applications. The technology enables simultaneous particulate matter trapping and NOX reduction, and provides thermal management and aftertreatment packaging benefits. However, there is little information detailing the lubricant derived exposure effects on functional SCR performance. A study was conducted to evaluate the impact of various oil consumption pathways on a light duty DOC and SCRoF aftertreatment system. This aftertreatment system was aged utilizing an engine test bench modified to enable increased oil consumption rates via three unique oil consumption pathways. The components were characterized for functional SCR performance, ash morphology, and ash deposition characteristics. This included utilizing techniques, such as SEM / EDS, to evaluate the ash structures and quantify the ash elemental composition. Imaging techniques were also leveraged to provide ash deposition insights via

Zavala, Bryan, Eakle, Scott, Henry, Cary

Microstructure Evolution during the Sintering of Blended Elemental Ti-23Nb-0.7Ta-2Zr-1.2O Gum Metal Alloy

2020-36-0046

03/26/2021

Gum metal alloy Ti-23Nb-0.7Ta-2Zr-l .20 (%at.) was developed based on theoretical calculations to reduce titanium elastic modulus by the addition of β stabilizing elements Nb and Ta, and Zr to provide increased strength without unduly increase in elastic modulus. Gum metal alloy presents unique properties, differing significantly from β-Ti traditional alloys, and enabling a wide range of possible applications. The alloy can be highly cold workable without work hardening, resulting in an elastic modulus as low as 40 GPa and elastic deformation further than 2.5%, thus the name gum metal. This investigation aimed to fabricate the alloy by powder metallurgy and to evaluate the microstructure evolution after sintering from 700 to 1200 °C. Elemental powders of Ti, Nb, Ta e Zr were produced by hydriding followed by milling. Compaction of samples was carried out by uniaxial and isostatic cold pressing. Micro structural characterization was performed by scanning electron microscopy and

Silva, Daniela Gomes, de Salvo, Joao Guilherme Jacon, Rodrigues Henriques, Vinçcius Andrç

Use of Cavitation Abrasive Surface Finishing to Improve the Fatigue Properties of Additive Manufactured Titanium Alloy Ti6Al4V (SAE Paper 2021-01-0024

1297403/16/2021

To improve the fatigue properties of additive manufactured (AM) titanium alloy Ti6Al4V, cavitation abrasive surface finishing (CASF) was proposed. With CASF, a high-speed water jet with cavitation, i.e. a cavitating jet, was injected into a water-filled chamber, to which abrasives were added. Abrasives accelerated by the jet created a smooth surface by removing un-melted particles on the surface. Simultaneously, cavitation impacts induced by the jet introduced compressive residual stress and work hardening into the surface, similar to cavitation peening. In this study, to demonstrate the improvement of the fatigue properties of AM Ti6Al4V owing to CASF, Ti6Al4V specimens manufactured through direct metal laser sintering (DMLS) and electron beam melting (EBM) were treated using CASF and cavitation peening, and tested using a plane bending fatigue test. The fatigue life of the specimen treated using CASF was found to be better than that of an as-built specimen, as CASF made the surface

Sanders, Dan

Performance of Zr/CeO _2- Al ₂ O ₃ Catalyst towards Oxidation of Diesel Soot

2021-28-0013

03/08/2021

Current work focuses on developing a non-noble metal-based Diesel Oxidation Catalyst (DOC) with high efficiency. In this work, 1% and 3% Zr supported on mesoporous CeO2-Al2O3 was prepared. The morphological, structural, and catalytic behavior of the synthesized catalyst was investigated through the BET surface area, SEM-EDX, XRD, and TGA. BET and XRD data revealed the catalyst’s mesoporous nature with a high surface area and low crystallinity. SEM images showed the porous nature of the catalyst’s surface, devoid of any agglomeration or sintering. EDX analysis further confirmed the elemental composition of the catalyst surface. TGA was used to study catalysts’ activity towards soot oxidation in loose contact mode. T50 observed for soot oxidation catalyzed over 1%, and 3% Zr/CeO2-Al2O3 was 263°C and 331°C, while for uncatalyzed soot, it was 400°C. The results conclude that the catalyst significantly enhanced soot oxidation. Comparing both catalysts, 3% Zr/CeO2-Al2O3 is more efficient

Shukla, Mritunjay Kumar, Dumaga, Kavita, Balyan, Yash, Bhaskar, Thallada, Dhar, Atul

Use of Cavitation Abrasive Surface Finishing to Improve the Fatigue Properties of Additive Manufactured Titanium Alloy Ti6Al4V

2021-01-0024

03/02/2021

Sanders, Daniel, Soyama, Hitoshi, de Silva, Channa

Items per page:

1 – 50 of 732