Browse Topic: Metallurgy

Items (17,652)
Find
Wear and Friction of PTFE and PEEK Coated Cast Iron Piston Ring2025-28-0121To be published on 02/07/2025
In general, around 30% out of total energy of engine is lost because of the friction among piston ring and cylinder liner due to their constant rubbing motion. A piston that reciprocates at high speeds has piston rings that constantly scrape against the wall leading to high frictional losses within the engine. The engine has to work against this resistance to deliver the required power, and hence it will consume more fuel. For this reason, material used for these components is more crucial. Reduction of surface friction between moving parts in order to upturn overall efficiency which can be attained by suitable coating. The most frequently used piston rings are covered with chromium layers that are electro-plated which is being replaced by chrome plating. Low coefficient of friction (COF) and remarkable wear resistance can be achieved by self-lubricating coating of PTFE and PEEK polymer-based composite coatings. Experimental results revealed that the PEEK and PTFE coating performed
Rajendran, R.
Technical Paper
Effect of Hardening and Tempering Temperatures on the Mechanical Behavior of Alloy Steel2025-28-0027To be published on 02/07/2025
Alloy steel possesses high strength, hardenability, fatigue strength, and good impact toughness. It is widely used for making various machine parts, automobile components, shafts, gears, connecting rods, and more. Hardening and tempering develop the optimum combination of hardness, strength, and toughness in engineering steel, thereby providing components with high mechanical properties. Hardening and tempering temperatures are crucial factors that affect the mechanical and metallurgical properties of 42Cr4Mo steel. In this research work, 42Cr4Mo alloy steel samples were subjected to hardening and tempering processes. The hardening temperatures were set at 830°C, 850°C, and 870°C, while the tempering temperatures were maintained at 590°C and 650°C. The test results show that hardening at 830°C and tempering at 590°C achieve high strength, which decreases as the temperature increases. Different hardening temperatures and constant tempering temperatures will be optimized to achieve the
Murugesan, Venkatasudhahar, Ganesan, Dharmalingam, Tarigonda, Hariprasad
Technical Paper
Experimental Characterization of Fabricated (310) and (210) Symmetrical Tilt High-Angle Grain Boundaries in Bicrystalline Copper Thin Films Using NaCl Substrates2025-28-0034To 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
Technical Paper
Microstructural characterization of aluminum alloys used in automotive body parts2024-28-0157To be published on 12/05/2024
To meet light-weighting and safety target of automotive vehicles, different aluminum alloys are used in various body parts. Apart from conventional manufacturing process of gravity die casting (GDC), advanced manufacturing process such as low pressure die casting (LPDC), high pressure die casting (HPDC) and extrusion processes are also used to form complex automotive body parts. Steel parts are majorly used in automotive applications across world. However, steel has limitations with respect to light-weighting. To achieve light-weighting, now a days, there is trend to use these complex aluminum parts in automotive industry to replace steel and integrate multiple parts into single part. Aluminum has emerges as great potential for light-weighting and reducing complexity of handling multiple parts at automotive plant. Aluminum provide additional benefits of high durability and crash performance. There is challenge to identify suitable etchant for microstructural characterization of
Deshmukh, Mansi, Jain, Vikas, Misal, Swapnali, Paliwal, Lokesh
Technical Paper
Aluminum Alloy, Hand Forgings 7.7Zn - 2.4Mg - 1.6Cu - 0.16Cr (7049-T7352) Solution Heat Treated, Stress Relieved by Compression, and Precipitation Heat TreatedAMS4247D (Current)11/21/2024
This specification covers an aluminum alloy in the form of hand forgings up to 5.000 inches (127.00 mm), inclusive, in nominal thickness at the time of heat treatment, procured to inch/pound dimensions (see 8.6
AMS D Nonferrous Alloys Committee
Material Specification
Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, Rings and Forging and Flash-Welded Ring Stock 64Ni - 5.0Cr - 24.5Mo - 5.5Fe (Alloy W) Solution Heat TreatedAMS5755H (Current)11/21/2024
This specification covers a corrosion- and heat-resistant nickel alloy in the form of bars, forgings, flash-welded rings, and stock for forging or flash-welded rings
AMS F Corrosion and Heat Resistant Alloys Committee
Material Specification
Compositional Sensitivity of High Mn, High Al Lightweight Steels2024-01-381511/15/2024
ABSTRACT The family of lightweight high Mn, high Al steels (FeMnAl) exhibit lower density (6.5-7.2 g/cm3) than traditional military steels (7.9 g/cm3). These alloys are precipitation hardened, with κ-carbide dominating hardening performance. This carbide has an E21 perovskite structure with a nominal composition of (Fe,Mn)3AlC. In the literature, a number of studies have examined the sensitivity of mechanical properties to changing a single element in the composition. However, the covariance of the major elements has not been systematically explored. In this study, a series of small ingots were prepared according to a two-factor design of experiments, in addition to analysis of previously generated compositions. Methods of measuring alloy composition will be discussed, along with aging kinetics and key mechanical properties. Citation: K. Sebeck, I. Toppler, K. Limmer, D. Field, D. Wagner, A. Gafner, “Compositional Sensitivity of High Mn, High Al Steels”, In Proceedings of the Ground
Sebeck, Katherine, Toppler, Ian, Limmer, Krista, Field, Daniel, Wagner, Daniel, Gafner, Alyssa
Technical Paper
Rigorous Accelerated Approach to Thermomechanical Processing Optimization for New Ballistic Protection Alloys2024-01-380711/15/2024
ABSTRACT The armor research and development community needs a more cost-effective, science-based approach to accelerate development of new alloys (and alloys never intended for ballistic protection) for armor applications, especially lightweight armor applications. Currently, the development and deployment of new armor alloys is based on an expert-based, trial-and-error process, which is both time-consuming and costly. This work demonstrates a systematic research approach to accelerate optimization of the thermomechanical processing (TMP) pathway, yielding optimal microstructure and maximum ballistic performance. Proof-of-principle is being performed on titanium alloy, Ti-10V-2Fe-3Al, and utilizes the Hydrawedge® unit of the Gleeble 3800 System (a servo-hydraulic thermomechanical testing device) to quickly evaluate mechanical properties and simulate rolling schedules on small samples. Resulting mechanical property and microstructure data are utilized in an artificial intelligence (AI
Lillo, Thomas, Chu, Henry, Anderson, Jeffrey, Walleser, Jason, Burguess, Victor
Technical Paper
Investigation of Hot Cracking Phenomena in Light-Weight Armor Steel Based on the FeMnAl-C Alloy System2024-01-373811/15/2024
ABSTRACT The US Army TARDEC has been researching an alternative to current armor steel that is both tough, and light-weight. The studied alloy is based on the Fe-Mn-Al-C system. This study was conducted to investigate and quantify this alloy’s susceptibility to hot cracking phenomena related to casting and welding. Very little research has been done on general weldability of this alloy system, so the results of these tests will be compared to other high Mn steels, and alloys that have undergone cast pin tear testing. Testing will be conducted utilizing button melting tests, autogenous spot welds, and cast pin tear testing. The cast pin tear testing was conducted to measure this alloys susceptibility to weld solidification cracking. The spot welds were used to quantify the susceptibility of the weld heat affected zone (HAZ) to liquation cracking, as well as to observe the solidification structure of the fusion zone. The testing results showed that the FeMnAl system in its current form
Evans, William, Ramirez, Antonio J., Sebeck, Katherine
Technical Paper
FLASH® BAINITE: ROOM TEMPERATURE WELDABLE ULTRA HARD 600, HIGH HARD 500, AND ADVANCED HIGH STRENGTH STEEL FOR A-CAB2024-01-374311/15/2024
ABSTRACT Flash® Bainite Processing employs rapid thermal cycling (<10s) to strengthen commercial off the shelf (COTS) steel sheet, plate, and tubing into Ultra Hard 600 Armor, High Hard 500 Armor, and advanced high strength steel (AHSS). In a continuous process, induction technology heats a narrow segment of the steel cross section in just seconds to atypically high temperature (1000-1300°C). Quenching substantially immediately follows. A report by Benet Labs and Picatinny Arsenal, investigating a less mature flash technology in 2011, surmised that the novel flash bainite process for steels has the potential to reduce cost and weight while also enhancing mechanical performance [1]. Receiving five financial grants, the US Dept of Energy has greatly matured flash technology in the last few years and its metallurgical understanding in collaboration with Oak Ridge National Lab and others. DOE has named Flash Bainite as the “SBIR Small Business of the Year” in May 2018 and awarded a Phase 3
Cola, Gary M
Technical Paper
3D-PRINTING IMPACTS ON SYSTEMS ENGINEERING IN DEFENSE INDUSTRY2024-01-352711/15/2024
ABSTRACT Today’s combat vehicle designs are largely constrained by traditional manufacturing processes, such as machining, welding, casting, and forging. Recent advancements in 3D-Printing technology offer tremendous potential to provide economical, optimized components by eliminating fundamental process limitations. The ability to re-design suitable components for 3D-printing has potential to significantly reduce cost, weight, and lead-time in a variety of Defense & Aerospace applications. 3D-printing will not completely replace traditional processes, but instead represents a new tool in our toolbox - from both a design and a manufacturing standpoint
Deters, Jason
Technical Paper
EVALUATION OF CANDIDATE METHODS FOR WELDING STEEL TO OTHER STRUCTURAL LIGHTWEIGHT METALS2024-01-374111/15/2024
ABSTRACT This paper addresses candidate technologies for attaching steels to selected lightweight materials. Materials of interest here include aluminum and titanium alloys. Metallurgical challenges for the aluminum-to-steel and titanium-to-steel combinations are first described, as well as paths to overcome these challenges. Specific joining approaches incorporating these paths are then outlined with examples for specific processes. For aluminum-to-steel joining, inertia, linear, and friction stir welding are investigated. Key elements of success included rapid thermal cycles and an appropriate topography on the steel surface. For titanium-to-steel joining, successful approaches incorporated thin refractory metal interlayers that prevented intimate contact of the parent metal species. Specific welding methods employed included resistance mash seam and upset welding. In both cases, the process provided both heat for joining and a relatively simple strain path that allowed significant
Gould, Jerry E., Eff, Michael, Namola, Kate
Technical Paper
Program Overview: Extra-Large, Metal Additive Manufacturing System, Targeted Towards Army Ground Vehicle Systems2024-01-392411/15/2024
ABSTRACT The Applied Science and Technology Research Organization of America (ASTRO America), Ingersoll Machine Tool (Ingersoll), MELD Manufacturing (MELD), Siemens Digital Industries (Siemens), The American Lightweight Materials Manufacturing Innovation Institute (ALMII), and the US Army CCDC-GVSC have partnered to show the feasibility of fabricating very large metal parts using a combination of additive and subtractive manufacturing technologies. The Army seeks new manufacturing technology to support supply chain strategy objectives to replace costly inventories and reduce lead times. While additive manufacturing (AM) has demonstrated production of metallic parts for military applications, the scale of these demonstrations is much smaller than required for large vehicle components and/or complete vehicle hull structures. Leveraging AM for large scale applications requires enhancements in the size, speed, and precision of the current commercially available state-of-the-art equipment
Rodriguez, Ricardo X., Wells, Corrine, Carter, Robert H., LaLonde, Aaron D., Goffinski, Curtis W., Cox, Chase D., Bell, Tim S., Kott, Norbert J., Gorey, Jason S., Czech, Peter A., Hoffmann, Klaus, Holmes, Larry (LJ) R.
Technical Paper
INCREASING POWER DENSITY BY ADVANCED MANUFACTURING, MATERIALS, AND SURFACE TREATMENTS2024-01-359511/15/2024
ABSTRACT Track vehicle Final Drive torque transferring capacity is constrained by the availability of packaging space, weight constraints, and material / heat treat properties. These constraints create a paradigm where as the increase in load due to weight growth is inversely related to life due to fatigue. Funded under Phase II SBIR contract W56HZV-13-C-0056, Loc Performance Products, Inc. (Loc) developed manufacturing processes aligned to key selected materials and surface treatments to break through this paradigm. The results of the SBIR efforts produced an optimized Final Drive design that addressed the increasing Gross Vehicle Weight (GVW) of the Bradley Fighting Vehicle while maintaining the current Final Drive packaging space, reducing lifecycle cost and maximizing performance in terms of power density and extending the life of the product
Militello, Anthony, Fowlkes, Edward
Technical Paper
METALLIC COMPOSITE MATERIALS FOR AFFORDABLE & RELIABLE THERMAL MANAGEMENT OF HIGH POWER DEVICES2024-01-317811/15/2024
ABSTRACT Lower cost aluminum silicon carbide (Al-SiC) metal matrix composite (MMC) produced by stir-casting is emerging as an important material in cost effectively improving the reliability of high power electronic devices; e.g. electronic (IGBT) baseplates, thermal spreaders & stiffeners for flip-chip microelectronics, and heat slugs or MCPCB base layers for high brightness LEDs. This paper will review the properties and competitive cost of these new Al-SiC materials as well as the ability to tailor the coefficient of thermal expansion (CTE) of the Al-SiC to minimize thermal fatigue on solder joints and reduce component distortion. The impact on the final component cost through the use of conventional forming techniques such as (a) rolling sheet followed by stamping, and, (b) die casting, will be described, as will be the opportunity of eliminating a thermal interface material (TIM) layer by integrating the thermal spreader with the heat sink for high power microelectronic packages
Drake, Allen, Schuster, David, Skibo, Michael
Technical Paper
Thermally Annealed, High Strength 3D Printed Thermoplastic Battery Bracket for M9982024-01-404911/15/2024
ABSTRACT A 3D printed battery bracket is strengthened via post-print thermal annealing, demonstrating a transitionable approach for additive manufacturing of robust, high performance thermoplastic components. Citation: E. D. Wetzel, R. Dunn, L. J. Holmes, K. Hart, J. Park, and M. Ludkey, “Thermally Annealed, High Strength 3D Printed Thermoplastic Battery Bracket for M998,” In Proceedings of the Ground Vehicle Systems Engineering and Technology Symposium (GVSETS), NDIA, Novi, MI, Aug. 16-18, 2022
Wetzel, E. D., Dunn, R., Holmes, L. J., Shearrow, Casey, Hart, K., Park, J., Ludkey, M.
Technical Paper
Correlation between Cell Thickness Profile and Lithium Plating: Applications in Lithium Plating Detection and Capacity Rollover Diagnostics2024-01-700911/15/2024
In the realm of low-altitude flight power systems, such as electric vertical take-off and landing (eVTOL), ensuring the safety and optimal performance of batteries is of utmost importance. Lithium (Li) plating, a phenomenon that affects battery performance and safety, has garnered significant attention in recent years. This study investigates the intricate relationship between Li plating and the growth profile of cell thickness in Li-ion batteries. Previous research often overlooked this critical aspect, but our investigation reveals compelling insights. Notably, even during early stage of capacity fade (~ 5%), Li plating persists, leading to a remarkable final cell thickness growth exceeding 20% at an alarming 80% capacity fade. These findings suggest the potential of utilizing cell thickness growth as a novel criterion for qualifying and selecting cells, in addition to the conventional measure of capacity degradation. Monitoring the growth profile of cell thickness can enhance the
Zhang, Jian, Zheng, Yiting
Technical Paper
FLASH® 600 ULTRA HIGH HARD: ROOM-TEMP ER120S-1 WELDABILITY TEKKEN, H-PLATE, BALLISTIC, & FSP DATA FOR IMPROVED SURVIVABILITY2024-01-390011/15/2024
ABSTRACT Survivability of a welded vehicle hull is directly tied to the performance of the grade of steel armor used. Selecting the highest performing grade of armor that can be welded into a specific location on a vehicle will improve survivability. While rolled homogeneous armor is the simplest to weld, challenges in welding high hard, and especially ultra high hard, are well known. Preventative measures to avoid weld cracking in vehicle structures can lead to increased costs during fabrication. Cracking of welds, both seen and unseen, in deployed vehicles directly impacts the survivability of the vehicle. Weld cracking during deployment further magnifies repair costs and leads to non-mission capable status. This analysis examines the weldability, ballistic/blast performance, and underlying metallurgy of Flash® Processed steels that have been tested by Army, Academia, and Industry. Citation: G. Cola, “Flash® 600 Ultra High Hard: Room-Temp ER120S-1 Weldability Tekken, H-Plate
Cola, Gary M
Technical Paper
Recent Developments on Aluminum 7075-Based Composite with Industrial Waste Fly Ash by Stir Casting and Their Applications05-18-02-000911/07/2024
Recent developments in manufacturing techniques and the development of Al7075 metal matrix composites (MMCs) with reinforcements derived from industrial waste have been steadily gaining popularity for aerospace and automobile applications due to their outstanding properties. However, there are still a lot of limitations with these composite materials. A great deal of research has been done to create new Al7075 MMC materials with the use of economic fly ash (FA) that possesses superior mechanical properties, corrosion resistance, density, and cycle cost. This review outlines different synthesis techniques used in the development of Al7075 MMCs using stir casting. Effects of FA along with other reinforcements on the mechanical, wear, machining, and microstructural properties of the composite are also discussed. Finally, a summary of the application of FA-based MMCs and a recap of the previous discoveries and challenges are reported. Future scope and potential areas of application are
Kumar, Randhir, Mondal, Sharifuddin
Journal Article
Titanium Alloy Sheet, Strip, and Plate, 6Al - 6V - 2Sn, Solution Heat Treated and AgedAMS4990E (Current)11/06/2024
This specification covers a titanium alloy in the form of sheet, strip, and plate up through 4 inches (101.6 mm) (see 8.5
AMS G Titanium and Refractory Metals Committee
Material Specification
Aluminum Alloy, Plate, 6.2Zn - 1.8Cu - 2.4Mg - 0.13Zr (7010-T7651), Solution Heat Treated, Stress Relieved, and Precipitation Heat TreatedAMS4204E (Current)11/06/2024
This specification covers an aluminum alloy in the form of plate 0.250 to 5.500 inch (6.35 to 139.70 mm), inclusive, in nominal thickness (see 8.5
AMS D Nonferrous Alloys Committee
Material Specification
Titanium Alloy, Sheet and Strip, 4Al - 2.5V - 1.5Fe, Electron Beam Single Melted. AnnealedAMS6949B (Current)11/06/2024
This specification covers a titanium alloy in the form of sheet and strip up to 0.143 inch (3.63 mm), inclusive, in nominal thickness (see 8.6
AMS G Titanium and Refractory Metals Committee
Material Specification
Titanium Alloy Bars, Forgings, and Forging Stock 6.0Al - 2.0Sn - 4.0Zr - 6.0Mo Solution Heat Treated and AgedAMS6906D (Current)11/06/2024
This specification covers a titanium alloy in the form of bars up through 4.000 inches (101.60 mm) in nominal diameter or least distance between parallel sides, inclusive, and maximum cross-sectional area of 32 square inches (206.5 cm2), forgings of thickness up through 4.000 inches (101.60 mm), inclusive, and maximum cross-sectional area of 32 square inches (206.5 cm2), and stock for forging of any size (see 8.6
AMS G Titanium and Refractory Metals Committee
Material Specification
Titanium Alloy, Round Bar and Wire, 3AI - 8V - 6Cr - 4Mo - 4Zr, Consumable Electrode Melted, Solution Heat Treated and Cold DrawnAMS4957H (Current)11/06/2024
This specification covers a titanium alloy in the form of round bar and wire 0.625 inch (15.88 mm) and under in nominal diameter or thickness (see 8.7
AMS G Titanium and Refractory Metals Committee
Material Specification
Steel, Corrosion-Resistant, Bars, Forgings and Forging Stock 10Cr - 5.5Ni - 14Co - 2Mo - 1W (0.19-0.23C), Premium Aircraft Quality, Vacuum Induction Melted, Vacuum Arc Remelted, Normalized and AnnealedAMS5922D (Current)11/06/2024
This specification covers a corrosion-resistant, premium aircraft-quality alloy steel in the form of bars, forgings, and stock for forging
AMS F Corrosion and Heat Resistant Alloys Committee
Material Specification
Forgings, Titanium Alloys Heat-Treated, Finished-Part Properties: Short-Traverse Tensile, Fracture Toughness, and Longitudinal Time-Dependent-TensionAMS4938B (Current)11/06/2024
This specification establishes requirements for titanium forgings of any shape or form from which finished parts are to be made (see 2.4.4, 8.3, and 8.6
AMS G Titanium and Refractory Metals Committee
Material Specification
Aluminum Alloy Forgings 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (7075-T7352) Solution Heat Treated, Stress Relieved by Compression, and OveragedAMS4147F (Current)11/06/2024
This specification covers an aluminum alloy in the form of die forgings up to 4 inches (102 mm), inclusive, in thickness and hand forgings up to 6 inches (152 mm), inclusive, in thickness (see 8.6
AMS D Nonferrous Alloys Committee
Material Specification
Procedures for Determining and Verifying Peening IntensityJ443_202411 (Historical)11/06/2024
This SAE Standard defines the method for deriving and verifying the peening intensity exerted onto a part surface during shot peening or other surface enhancement processes
Surface Enhancement Committee
Recommended Practice
Effect of Separator on Sodium Deposition and Performance of Anode-Free Sodium Metal Batteries2024-01-433111/05/2024
Anode-free sodium metal batteries (AFSMBs) with initial zero sodium anodes are promising energy-storage devices to achieve high energy density and low cost. The morphology and reversibility of sodium controls the cycling lifespan of the AFSMBs, which is directly affected by the separator. Here, we compared the sodium deposition and corresponding electrochemical behaviors under the influence of three commercial separators, which were Celgard 2500, Al2O3-coated PP separator and glass fiber (denoting as 2500, C-PP and GF). Firstly, the reversibility of sodium plating/stripping was tested using half-cells, where coulombic efficiencies were stable at ~99.89% for C-PP and GF compare to 99.65% for 2500, indicating more dead sodium were formed for 2500. Then, the morphologies of deposited sodium were compared using optical microscopy. Compared to inhomogeneous sodium growth under 2500, C-PP obtained more flatter sodium layer with less height difference, attributing to the high mechanical
Qin, Nan, Jin, Liming, Zheng, Jim P.
Technical Paper
Steel, Nitriding, Bars, Forgings, Mechanical Tubing and Forging Stock Aircraft Quality 1.1Cr - 3.5Ni - 0.25Mo - 1.2Al (0.21 - 0.26CAMS6475M (Current)10/28/2024
This specification covers an age-hardenable nitriding grade of aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock
AMS E Carbon and Low Alloy Steels Committee
Material Specification
Aluminum Alloy, Plate (7140-T7451) 6.6Zn - 1.8Cu - 2.0Mg - 0.10Zr Solution Heat Treated, Stress Relieved, and OveragedAMS4401C (Current)10/28/2024
This specification covers an aluminum alloy in the form of plate 4.001 to 10.000 inches (101.60 to 254.00 mm), inclusive, in nominal thickness
AMS D Nonferrous Alloys Committee
Material Specification
Steel, Corrosion- and Heat-Resistant, Bars, Wire, Forgings, Mechanical Tubing, Rings, and Stock for Forging and Rings 17Cr - 12Ni - 2.5Mo (0.030 Max C) (316L), Solution Heat TreatedAMS5653K (Current)10/21/2024
This specification covers a corrosion- and heat-resistant steel in the form of bars, wire, forgings, mechanical tubing, flash-welded rings, and stock for forging or flash-welded rings
AMS F Corrosion and Heat Resistant Alloys Committee
Material Specification
Aluminum Alloy, Extrusions 4.0Cu - 1.3Mg - 0.60Mn (2026-T3511) Solution Heat Treated and Stress Relieved by StretchingAMS4338C (Current)10/08/2024
This specification covers an aluminum alloy in the form of extruded bars, rods, and profiles (shapes) with a maximum cross-sectional area of 25 square inches (161 cm2), a maximum circle size of 12 inches (305 mm), and a nominal thickness up to 3.250 inches (82.54 mm), inclusive (see 8.6
AMS D Nonferrous Alloys Committee
Material Specification
Polytetrafluoroethylene (PTFE) Moldings Premium Grade, As SinteredAMS3668F (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
Material Specification
Polytetrafluoroethylene (PTFE) Moldings General Purpose Grade, As SinteredAMS3660F (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
Material Specification
Plating, Bronze Nitriding Stop-off 90Cu - 10SnAMS2429F (Current)10/08/2024
This specification covers the requirements for electrodeposited bronze plate and its subsequent removal
AMS B Finishes Processes and Fluids Committee
Material Specification
Spacers and Washers, Procurement Specification for, MetricMA1784A (Historical)10/03/2024
This specification covers metric aircraft quality spacers for use as positioners for tubes, flat washers for use as load spreaders, galling protection of adjacent surfaces and or material compatibility, and key or tab washers for use as locks for bolts, nuts, and screws
E-25 General Standards for Aerospace and Propulsion Systems
Technical Standard
Synthesis and Characterization of AA6351/SiC Composites Using Ball Milling Combined with Hot Extrusion05-18-01-000310/03/2024
In this investigation, AA6351 alloy matrix composites with a larger volume proportion of SiC (20 wt%) were fabricated and tested for microstructure and mechanical behavior. Composites were hot extruded from mechanically milled matrix and reinforcements. Hot extrusion uniformly distributed reinforcements in the matrix and strengthened phase interaction. Mechanical ball milling causes AA6351 powder to become more homogeneous, reducing the mean particle size from 38.66 ± 2.31 μm to 23.57 ± 2.31 μm due to particle deformation. The micrograph shows that the SiC particles are equally dispersed in the AA6351 matrix, avoiding densification and reinforcing phase integration issues during hot extrusion. In hot extrusion, SiC particles are evenly distributed in the matrix, free of pores, and have strong metallurgical bonds, resulting in a homogenous composite microstructure. SiC powders and mechanical milling increase microhardness and compressive strength, giving MMC-A 54.9% greater than AA6351
Saiyathibrahim, A., Murali Krishnan, R., Jatti, Vinaykumar S., Jatti, Ashwini V., Jatti, Savita V., Praveenkumar, V., Balaji, K.
Journal Article
BOLT, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, PD SHANK AMS5616, .3125-24 UNJF-3AAS9887A (Current)10/03/2024
E-25 General Standards for Aerospace and Propulsion Systems
Technical Standard
Steel, Corrosion- and Heat-Resistant, Bars, Wire, Forgings, Mechanical Tubing, Rings, and Stock for Forging and Rings, 25Cr - 20Ni (310), Solution Heat TreatedAMS5651L (Current)10/01/2024
This specification covers a corrosion- and heat-resistant steel in the form of bars, wire, forgings, mechanical tubing, flash-welded rings, and stock for forging or flash-welded rings
AMS F Corrosion and Heat Resistant Alloys Committee
Material Specification
Steel, Corrosion- and Heat-Resistant, Bars, Wire, Forgings, Mechanical Tubing, Rings and Stock for Forging and Flash-Welded Rings, 12Cr (410), Aircraft Quality, Ferrite Controlled, AnnealedAMS5612L (Current)10/01/2024
This specification covers an aircraft quality, corrosion- and heat-resistant steel in the form of bars, wire, forgings, mechanical tubing, flash-welded rings, and stock for forging or flash-welded rings
AMS F Corrosion and Heat Resistant Alloys Committee
Material Specification
Rings, Sealing, Cast Leaded-Tin Bronze, 80Cu - 16Sn - 5Pb As CastAMS7320H (Current)10/01/2024
This specification covers a cast leaded-tin bronze in the form of sealing rings (see 8.5
AMS D Nonferrous Alloys Committee
Material Specification
Sheet and Strip, Steel (0.90 - 1.04C) (SAE 1095) AnnealedAMS5121M (Current)10/01/2024
This specification covers a carbon steel in the form of sheet and strip
AMS E Carbon and Low Alloy Steels Committee
Material Specification
Steel, Extra High Toughness, Corrosion-Resistant, Bars, Wire, Forgings, Rings, and Extrusions 13Cr - 8.0Ni - 2.2Mo - 1.1Al Vacuum Induction Plus Consumable Electrode Melted, Solution Heat Treated, Precipitation Hardened (H1050AMS5934/H1050 (Current)10/01/2024
This specification covers a corrosion-resistant steel product in the solution and precipitation heat-treated (H1050) condition, 12 inches (305 mm) and under in nominal diameter, thickness, or, for hexagons, least distance between parallel sides
AMS F Corrosion and Heat Resistant Alloys Committee
Material Specification
Plating, Electroless Nickel-PhosphorousAMS2404K (Current)10/01/2024
This specification covers the requirements for electroless nickel with phosphorus deposited on various materials
AMS B Finishes Processes and Fluids Committee
Material Specification
Brass Tubing, Seamless, 66.5Cu - 33Zn - 0.45Pb, AnnealedAMS4554D (Current)09/27/2024
This specification covers one grade of brass in the form of seamless tubing (see 8.5
AMS D Nonferrous Alloys Committee
Material Specification
Wire, Steel 0.18 - 0.23C (SAE 1020) AnnealedAMS5032J (Current)09/18/2024
This specification covers a low-carbon steel in the form of wire up to 0.249 inch (6.32 mm), inclusive, supplied as coils of wire or, when specified, as straight lengths
AMS E Carbon and Low Alloy Steels Committee
Material Specification
Nickel Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate 41.5Ni - 16Cr - 37Fe - 2.9Cb (NB) - 1.8Ti Consumable Electrode or Vacuum Induction Melted, 1750 °F (954 °C) Solution Heat TreatedAMS5606G (Current)09/18/2024
This specification covers a corrosion- and heat-resistant nickel alloy in the form of sheet, strip, and plate 1.000 inch (25.40 mm) and under in nominal thickness
AMS F Corrosion and Heat Resistant Alloys Committee
Material Specification
Plating, Nickel-Cadmium DiffusedAMS2416N (Current)09/18/2024
This specification covers the requirements for an electrodeposit of cadmium diffused into an electrodeposit of nickel on carbon, low-alloy, and corrosion-resistant steels
AMS B Finishes Processes and Fluids Committee
Material Specification
Plating, TinAMS2408L (Current)09/18/2024
This specification covers the requirements for electrodeposition of tin on metals and the properties of the deposit
AMS B Finishes Processes and Fluids Committee
Material Specification
Items per page:
1 – 50 of 17652