Tensile and cyclic behavior of high pressure die cast AE44 magnesium alloy have been studied at room temperature and elevated temperatures up to 350°C. Anelastic behavior has been found in both tensile and cyclic loading at the temperature below 200°C. With increasing temperature, the anelasticity disappears, and tensile and cyclic behaviors become like other engineering materials, such as steels and aluminum alloys, i.e. the total strain contains only elastic strain and plastic strain. A method to determine the yield strength at 0.2% plastic strain (σ0.2) is proposed. By using the proposed method, the yield strength σ0.2 is found to be higher than that determined using the traditional method, which is more suitable to the materials that do not exhibit anelasticity. It is believed that the anelasticity is closely related to twinning in Mg alloy, which disappears at elevated temperatures.

Liu, Yi, Yang, Wenying, Coryell, Jason

Investigation on Microstructure and Mechanical Properties in the Dissimilar Joining of WE43 to AA7075 Alloy using FSW

2026-01-0229

4/7/2026

This research investigates the alterations in microstructure, microhardness, and joint strength resulting from the dissimilar friction stir welding (FSW) of WE43 magnesium alloy to AA7075 aluminium alloy. The study specifically analyses the role of FSW process parameters in the formation of intermetallic compounds (IMCs), the evolution of grain structure, the resultant microhardness distribution across the weld zone, and the joint tensile strength. A comprehensive microstructural characterization was performed utilizing optical microscopy (OM), field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy (FESEM-EDS), electron backscatter diffraction (EBSD), and X-ray diffraction (XRD). These analyses confirmed significant grain refinement in the stir zone and the identification of various IMCs at the weld interface. Microhardness mapping indicated a gradient profile, with the weld nugget exhibiting superior hardness attributed to its dynamically recrystallized

Ahmad, Tariq, Khan, Noor Zaman, Ahmad, Babar, Siddiquee, Arshad Noor

Magnesium Alloy, Plate, Extra Flat, 3.0Al - 1.0Zn - 0.20Mn (AZ31B-0), Annealed

AMS4382E (Current)

3/13/2026

This specification covers a magnesium alloy in the form of plate 0.250 to 6.000 inches (6.35 to 152.40 mm), inclusive, in nominal thickness (see 8.5).

AMS D Nonferrous Alloys Committee

Plate, Magnesium Alloy, 3.0Al - 1.0Zn - 0.20Mn (AZ31B-H26), Cold Rolled and Partially Annealed

AMS4376J (Current)

2/6/2026

This specification covers a magnesium alloy in the form of plate 0.250 to 2.000 inches (6.35 to 50.80 mm), inclusive, in nominal thickness (see 8.5).

AMS D Nonferrous Alloys Committee

Magnesium Alloy, Extrusions, 6.5Al - 0.95Zn (AZ61A-F), As Extruded

AMS4350P (Current)

2/6/2026

This specification covers a magnesium alloy in the form of extruded bars, rods, wire, tubing, and profiles.

AMS D Nonferrous Alloys Committee

Magnesium Alloy, Investment Castings, 10Al (AM100A-T6), Solution and Precipitation Heat Treated

AMS4455J (Current)

1/23/2026

This specification covers a magnesium alloy in the form of investment castings (see 8.6).

AMS D Nonferrous Alloys Committee

Aluminum Alloy, Plate (7255-T7751) 8.0Zn - 2.3Cu - 2.0Mg - 0.12Zr Solution Heat Treated, Stress Relieved, and Overaged

AMS4463B (Current)

7/1/2025

This specification covers an aluminum alloy in the form of plate 0.750 to 1.500 inches, incl (19.05 to 38.10 mm, incl) in thickness (see 8.6).

AMS D Nonferrous Alloys Committee

Magnesium Alloy Castings, Sand, 8.7Al - 0.70Zn (AZ91C-T6), Solution Heat Treated and Aged

AMS4437G (Current)

6/17/2025

This specification covers a magnesium alloy in the form of sand castings (see 8.6).

AMS D Nonferrous Alloys Committee

Magnesium Alloy, Sheet and Plate, 3.0Al - 1.0Zn - 0.20Mn (AZ31B-H24), Cold Rolled, Partially Annealed

AMS4377K (Current)

6/17/2025

This specification covers a magnesium alloy in the form of sheet and plate 0.016 to 3.000 inches (0.41 to 76.20 mm) in nominal thickness (see 8.6).

AMS D Nonferrous Alloys Committee

Hard Anodic Coating of Magnesium Alloys Alkaline, Non-Chromate Type, High Voltage

AMS2466D (Current)

6/17/2025

This specification covers the requirements for a hard anodic coating on magnesium alloys and the properties of the coating.

AMS B Finishes Processes and Fluids Committee

Magnesium Alloy Castings, Permanent Mold, 9.0Al - 2.0Zn (AZ92A-T6), Solution and Precipitation Heat Treated

AMS4484M (Current)

4/14/2025

This specification covers a magnesium alloy in the form of permanent mold castings (see 8.6).

AMS D Nonferrous Alloys Committee

Magnesium Alloy Castings, Permanent Mold, 10Al (AM100A-T6), Solution and Precipitation Heat Treated

AMS4483F (Current)

4/14/2025

This specification covers a magnesium alloy in the form of permanent mold castings (see 8.6).

AMS D Nonferrous Alloys Committee

Self-Piercing Riveting (SPR) of Magnesium High Pressure Die Casting and Dissimilar Materials

2025-01-8231

4/1/2025

Solid state joining processes are attractive for magnesium alloys as they can offer robust joints without the porosity issue typically associated with welding of magnesium and dissimilar materials. Among these techniques, Self-Piercing Riveting (SPR) is a clean, fast and cost-effective method widely employed in automotive industry for aluminum alloys. While SPR has been proven effective for joining aluminum and steel, it has yet to be successfully adapted for magnesium alloy castings. The primary challenge in developing magnesium SPR technology is the cracking of the magnesium button, which occurs due to magnesium's low formability at room temperature. Researchers and engineers approached this issue with several techniques, such as pre-heating, applying rotation to rivets, using a sacrificial layer and padded SPR. However, all these methods involve the employment of new equipment or introduction of extra processing steps. The aim of this work is to develop a SPR technique which adapts

Tabatabaei, Yousef, Wang, Gerry, Weiler, Jonathan

Microstructure, Tensile and Fracture Behaviors of Squeeze Cast Wrought Mg Alloy AZ80

2025-01-8230

4/1/2025

Wrought magnesium alloy AZ80 with a thick section of 20 mm was prepared by squeeze casting (SC) and permanent steel mold casting (PSMC). The porosity measurements of the SC and PSMC showed that the SC AZ80 had a porosity of 0.52%, which was the 77% lower than that (2.21%) of the PSMC counterpart. The microstructure analyses and phase identification indicated that the cast AZ80 alloy consisted of a primary α-Mg phase, eutectic Mg-Al-Zn phases and Al-Mn intermetallic. The fine primary α-Mg dendrites and a high amount of the intermetallic phase were present in the SC AZ80 alloy. The yield strength (YS), ultimate yield strength (UTS), elongation (ef), elastic modulus (E) and strain hardening rate of the cast AZ80 specimens were evaluated by tensile testing. The measured engineering stress versus strain curves showed that the SC AZ80 alloy exhibited 84.68 MPa in YS, 168.23 MPa in UTS, 5.07% in ef, and 25.1GPa in modulus while the YS, UTS and ef of the PSMC specimen were only 71.61 MPa

Ying, Peilin, Hu, Henry, Hu, Anita, Shen, Wutian

Aluminum Foil for Sandwich Construction

AMSA81596A (Current)

3/27/2025

This specification covers the requirements of uncoated aluminum alloy foil for core materials required for structural sandwich construction.

AMS D Nonferrous Alloys Committee

Stir Casting Synthesis and Evaluation of SiC Nanoparticle-Reinforced AZ31 Magnesium Alloy Nanocomposites

2025-01-5013

3/10/2025

In an attempt to improve its mechanical characteristics in the as-fasted conditions, the AZ31 Mg alloy was investigated herein from being reinforced with diverse SiC weight percentages (3, 6, and 9 wt.%). To develop lightweight AZ31-SiC composites, a simple and inexpensive technique, the stir casting process, was used. Microstructural analysis of the as-cast samples showed that the SiC particles were distributed rather uniformly, were firmly bonded to the matrix, and had very little porosity. The substantial improvement in tensile, compressive, and hardness characteristics was caused by fragmentation and spreading of the Mg17Al12 phase, while the addition of SiC had only a slight effect on the microstructure in the as-cast state. Surfaces of AZ31-SiC composites were analyzed using scanning electron microscopy. A study identified the AZ31-SiC composite as a unique material for applications involving a high compressive strength, such as those found in the aviation and automobile

Thillikkani, S., Kumar, N. Mathan, Francis Luther King, M., Soundararajan, R., Kannan, S.

Synthesis and Machining Characteristics Evaluation of Silicon Nitride Made Magnesium Alloy Composites

05-18-03-0017

1/20/2025

The advantages of magnesium alloy composites over traditional engineering materials include their high strength and lightweight for automotive applications. The proposed work is to compose the AZ61 alloy composite configured with 0–12% silicon nitride (Si3N4) via semisolid-state stir processing assisted with a (sulfur hexafluoride—SF6) inert environment. The prepared AZ61 alloy and AZ61/4% Si3N4, AZ61/8% Si3N4, and AZ61/12% Si3N4 are machined by electrical discharge machining (EDM) under varied source parameters such as pulse On/Off (Ton/Toff) time (100–115/30–45 μs), and composition of composite. The impact of EDM source parameters on metal removal rate (MRR) and surface roughness (Ra) is measured. For finding the optimum source for higher MRR and good surface quality of EDM surface, the ANOVA optimization tool with L16 design is executed and analyzed via a general linear model approach. With the influence of ANOVA, the Ton/Toff and composite composition found 95.42%/1.27% and 0.36

Venkatesh, R.

Study of Functional Behaviour of Cast Magnesium Alloy with Zirconium Addition

2024-01-5206

12/10/2024

Magnesium is the lightest material than aluminium and has a better specific strength, which is utilized for weight management applications. This research developed the magnesium (Mg) matrix with 0.1, 0.2, 0.3, and 0.5 percentages in weight (wt%) of zirconium (Zr) particles (grain refinement agent) via the squeeze cast technique. The argon inert gas is limit oxidation during the melting of Mg. The influence of Zr on the functional properties of Mg is studied and related to monolithic Mg without the Zr phase. The microstructural analysis provides the Zr particles are dispersed uniformly in the Mg matrix and exposed to superior mechanical properties. The Mg processed with 0.5 wt% of Zr offered maximum hardness, ultimate tensile strength, and elongation percentage, which are 53, 48.8, and 43.5 % better than the values of monolithic Mg. Besides, the optimum Mg refining with 0.5 wt% Zr microstructure is detailed with EDS and conforms to the contribution of Zr. This is used for automotive

Venkatesh, R., Manivannan, S., Das, A. Daniel, Mohanavel, Vinayagam, Soudagar, Manzoore Elahi Mohammad

Effect on Ageing and Cerium Addition on Magnesium Alloy

2024-01-5209

12/10/2024

Magnesium (Mg) alloys are becoming ever more ubiquitous as the need for lighter and stronger alloys has increased significantly in the past decades. Mg alloy grade AZ91D is embedded in 0.5 of cerium have a high strength-to-weight ratio and lower specific density, which is useful in the case of automobile applications. An inconclusive study by Lagowski has shown that interrupted age hardening of AZ magnesium alloy increases the yield strength by around 10%. An investigation on the developed AZ91D+0.5Ce alloy subjected to various ageing treatments was carried out in this present study. The various aged samples were investigated by optical microscopy and scanning electron microscopy analysis. The yield strength was also evaluated quantitatively as a function of ageing parameters. A significant increase in yield strength and hardness values was observed in the artificially aged samples due to the precipitation of Mg17Al12 phases.

Venkatesh, R., Manivannan, S., Das, A. Daniel, Mohanavel, Vinayagam, Soudagar, Manzoore Elahi Mohammad

Magnesium Alloy Hybrid Composite Properties are Featured with Boron Carbide Particle for Automotive Seat Frame Usage

2024-01-5207

12/10/2024

With the advancement of lightweight magnesium-based hybrid composites, are potential for weight management applications. The liquid state stir cast process is the best way to produce complex shapes and most industries are preferred. However, the melting of magnesium alloy and achieving homogenous particle distribution are the major challenges for the conventional stir-casting process, and hot crack formation is spotted due to thermal variations. The main objectives of the present research are to enhance the microstructural and mechanical behaviour of magnesium alloy hybrid nanocomposite (AZ91E) adopted with boron carbide (B4C) and alumina (Al2O3) nanoparticles through a semisolid stir cast technique associated with inert atmosphere helps to limits the oxide formation and reduce risk of magnesium fire. The effect of composite processing and multiple reinforcements on surface morphology, tensile strength, impact strength, and hardness were thoroughly evaluated and compared. The results

Manivannan, S., Venkatesh, R., Kaliyaperumal, Gopal, Karthikeyan, S., Mohanavel, Vinayagam, Soudagar, Manzoore Elahi Mohammad, Karthikeyan, N.

Characteristics of Magnesium Composite Reinforced with Silicon Carbide and Boron Nitride via Liquid Stir Processing

2024-01-5237

12/10/2024

The present aim of the investigation is to prepare and evaluate the excellence of boron nitride (BN) and silicon carbide nanoparticles on characteristics of magnesium alloy (AZ91D) hybrid nanocomposite. This constitution of AZ91D alloy hybrid nanocomposite is made through the liquid state processing route, which helps to improve the spread of particles in the AZ91D matrix. The impact of BN and SiC on microstructural and mechanical properties like tensile strength, hardness, and impact strength of AZ91D alloy composites are studied, and its investigational results are compared. Besides, microstructural studies have revealed that the structure of composite is found to have better BN and SiC particle dispersion and uniformity. The 5 percentage in weight (wt%) of BN and 5 wt% of SiC facilitated better tensile strength (183 MPa), hardness (85HV), and impact strength (21.4J/mm2) behaviour, which are 26, 30, and 35% better than the monolithic AZ91D alloy. This AZ91D/5wt% BN and 5wt% SiC

Venkatesh, R., Kaliyaperumal, Gopal, Manivannan, S., Karthikeyan, S., Mohanavel, Vinayagam, Soudagar, Manzoore Elahi Mohammad, Karthikeyan, N.

Characterization of Graphene and Titanium Carbide Reinforced Magnesium Alloy Composite for Transmission Housings in Automobile

2024-01-5231

12/10/2024

This study presents the mechanical characterization studies on 3 wt.% graphene (Gr) filled magnesium matrix composite reinforced with different weight fractions (4, 8, 12, 16, and 20 wt.%) of titanium carbide (TiC) particles. The matrix is AZ91 alloy, and the nano magnesium composite (NMC) is fabricated via a squeeze casting approach. The lightweight NMC is a potential solution for the automobile industry, as it reduces greenhouse gas emissions and contributes to environmental sustainability. Gr is added to enhance the composite's thermal endurance and mechanical strength. Mechanical and corrosion studies are performed as per the ASTM standards. The inclusion of Gr and 16 wt.% TiC tends to enhance the mechanical durability and corrosion resilience of the NMC when compared with other fabricated composites and cast alloys. The uniform dispersal of NC and TiC and better mould properties lead to better strength. Higher inclusion of TiC (20 wt.%) leads to brittleness, thereby decreasing the

Senthilkumar, N.

Magnesium Alloy, Extrusions, 4.0Y - 2.25Nd - 0.5Zr (WE43C - T5), Precipitation Heat Treated

AMS4485B (Current)

12/4/2024

AMS D Nonferrous Alloys Committee

Magnesium Alloy and Silicon Nitrides Composite Study: Synthesis and Abrasive Water Jet Machining Behavior and Optimization

05-18-02-0014

11/15/2024

Related to traditional engineering materials, magnesium alloy-based composites have the potential for automobile applications and exhibit superior specific mechanical behavior. This study aims to synthesize the magnesium alloy (AZ61) composite configured with 0 wt%, 4 wt%, 8 wt%, and 12 wt% of silicon nitride micron particles, developed through a two-step stir-casting process under an argon environment. The synthesized cast AZ61 alloy matrix and its alloy embedded with 4 wt%, 8 wt%, and 12 wt% of Si3N4 are subjected to an abrasive water jet drilling/machining (AJWM) process under varied input sources such as the diameter of the drill (D), transverse speed rate (v), and composition of AZ61 composite sample. Influences of AJWM input sources on metal removal rate (MRR) and surface roughness (Ra) are calculated for identifying the optimum input source factors to attain the best output responses like maximum MRR and minimum Ra via analysis of variant (ANOVA) Taguchi route with L16 design

Venkatesh, R.

Magnesium Alloy, Sand Castings 4.5Zn - 0.75Zr (ZK51A-T5) Precipitation Heat Treated

AMS4443J (Current)

7/15/2024

This specification covers a magnesium alloy in the form of sand castings.

AMS D Nonferrous Alloys Committee

Magnesium Alloy Welding Wire, 9.0Al - 2.0Zn (AZ92A)

AMS4395G (Current)

5/17/2024

This specification covers a magnesium alloy in the form of welding wire (see 8.5).

AMS D Nonferrous Alloys Committee

Magnesium Alloy, Extrusions, 5.5Zn - 0.45Zr (ZK60A-T5), Precipitation Heat Treated

AMS4352K (Current)

5/1/2024

This specification covers a magnesium alloy in the form of extruded bars, rods, wire, tubing, and profiles up to 40 square inches (258 cm2) in cross-sectional area (solids) and up to 8.5 inches (216 mm) OD by 1.188 inches (30.18 mm) wall thickness (tubing) (see 8.5).

AMS D Nonferrous Alloys Committee

Sheet and Plate, Magnesium Alloy 3.0Al - 1.0Zn - 0.20Mn (AZ31B-O) Annealed and Recrystallized

AMS4375N (Current)

5/1/2024

This specification covers a magnesium alloy in the form of sheet and plate from 0.016 to 3.000 inches (0.41 to 76.20 mm), inclusive, in thickness (see 8.5).

AMS D Nonferrous Alloys Committee

Magnesium Alloy Welding Wire 1.5Ag - 2.1Di - 0.08Cu - 0.70Zr (EQ21A)

AMS4400A (Current)

4/10/2024

This specification covers a magnesium alloy in the form of welding wire (see 8.5).

AMS D Nonferrous Alloys Committee

Magnesium Alloy Welding Wire 8.7Al - 0.70Zn - 0.26Mn (AZ91E)

AMS4398A (Current)

4/9/2024

This specification covers a magnesium alloy in the form of welding wire (see 8.5).

AMS D Nonferrous Alloys Committee

Magnesium Alloy Welding Wire, 4.0Y - 2.3Nd - 0.7Zr (WE43B)

AMS4393A (Current)

4/9/2024

This specification covers a magnesium alloy in the form of welding wire (see 8.6).

AMS D Nonferrous Alloys Committee

Magnesium Alloy Welding Wire, 4.2Zn - 1.2 Rare Earths - 0.7Zr (ZE41A)

AMS4392A (Current)

4/9/2024

This specification covers a magnesium alloy in the form of welding wire (see 8.5).

AMS D Nonferrous Alloys Committee

Magnesium Alloy Welding Wire, 2.8Nd - 1.4Gd - 0.4Zn - 0.6Zr (EV31A)

AMS4391A (Current)

4/9/2024

This specification covers a magnesium alloy in the form of welding wire (see 8.5).

AMS D Nonferrous Alloys Committee

Magnesium Alloy Welding Wire 5.1Y - 3.0Re - 0.7Zr (WE54A)

AMS4399A (Current)

4/9/2024

This specification covers a magnesium alloy in the form of welding wire (see 8.6).

AMS D Nonferrous Alloys Committee

Magnesium Alloy Welding wire, 2.5Ag - 2.1Di - 0.70Zr (QE22A)

AMS4394A (Current)

4/9/2024

This specification covers a magnesium alloy in the form of welding wire (see 8.5).

AMS D Nonferrous Alloys Committee

Magnesium Alloy Welding Wire, 3.2 Rare Earths - 2.5Zn - 0.72Zr (EZ33A)

AMS4396G (Current)

4/9/2024

This specification covers a magnesium alloy in the form of welding wire (see 8.5).

AMS D Nonferrous Alloys Committee

Synergistic Impact of Mechanical Properties on Friction Stir Welding Zone Formation in Magnesium Alloy: An Optimized Approach

2024-01-5034

3/14/2024

A growing number of industries are utilizing friction stir welding (FSW), which has shown promise for joining different materials. In this study, the impacts of rotation speed and tool pin shape are examined, as well as the FSW zone generation in the magnesium alloy AZ31. The physical attributes of rotation speed, feed rate, pin profile shape, and the mechanical properties of the AZ31 magnesium alloy hardness, impact energy, and tensile strength are examined in this research to determine the properties of FSW. Under optimal conditions, taper-threaded tool pins, 40 mm/min welding speed, and 1000 rpm rotation speed achieved maximal micro-hardness. The FSW tool creates heat at 1000 rpm, improving the softened metal’s mechanical properties. Thus, the metal content in the stir zone was uniform. Some process variables impacted the response surface methodology (RSM) parametric design and subsequent optimization procedure. According to the analysis, the tool’s rotational speed was the key

Sabari, K., Muniappan, A., Singh, Mandeep

AZ31-MWCNT Composites Fabricated Through Powder Metallurgy for Aerospace Applications

2024-01-1938

3/5/2024

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

Microstructure, Worn Surface, Wear Assessment and Taguchi’s Approach of Titanium Alloy Hybrid Metal Matrix Composites for Automotive Applications

2023-01-5103

2/23/2024

Lightweight materials are in great demand in the automotive sector to enhance system performance. The automotive sector uses composite materials to strengthen the physical and mechanical qualities of light weight materials and to improve their functionality. Automotive elements such as the body shell, braking system, steering, engine, battery, seat, dashboard, bumper, wheel, door panelling, and gearbox are made of lightweight materials. Lightweight automotive metals are gradually replacing low-carbon steel and cast iron in automobile manufacture. Aluminium alloys, Magnesium alloys, Titanium alloys, advanced high-strength steel, Ultra-high strength steel, carbon fiber-reinforced polymers, and polymer composites are examples of materials used for light weighing or automobile decreased weight. The ever-present demand for fuel-efficient and ecologically friendly transport vehicles has heightened awareness of lowering weight and performance development. Titanium alloys properties are

Ramana Murty Naidu, S. C. V., Kalidas, N., Venkatachalam, Sivaraman, Mukuloth, Srinivasnaik, Asary, Abdul Rab, Naveenprabhu, V., Vishnu, R., Vellingiri, Suresh

Wear Behavior of Hard Ceramic Coatings by Aluminum Oxide– Aluminum Titanate on Magnesium Alloy

2023-01-5109

2/23/2024

Magnesium and its alloys are promising engineering materials with broad potential applications in the automotive, aerospace, and biomedical fields. These materials are prized for their lightweight properties, impressive specific strength, and biocompatibility. However, their practical use is often hindered by their low wear and corrosion resistance. Despite their excellent mechanical properties, the high strength-to-weight ratio of magnesium alloys necessitates surface protection for many applications. In this particular study, we employed the plasma spraying technique to enhance the low corrosion resistance of the AZ91D magnesium alloy. We conducted a wear analysis on nine coated samples, each with a thickness of 6mm, to assess their tribological performance. To evaluate the surface morphology and microstructure of the dual-phase treated samples, we employed scanning electron microscopy (SEM) and X-ray diffraction (XRD). The bare AZ91D magnesium alloy exhibited a microhardness value

Kishore Kanna, K., Mohamed Thariq, R., Marimuthu, S., Daniel Das, A., Suresh Balaji, R., Manivannan, S.

Exploring Stress Corrosion Cracking in Magnesium-Based Alloys Exposed to Potassium Chromate in Automotive Applications

2023-01-5145

2/23/2024

Magnesium alloys possess a unique combination of benefits stemming from their exceptional strength-to-weight ratio and reduced density. The aforementioned attributes render them notably attractive for utilization in automotive and aeronautical sectors. Furthermore, these alloys are gaining significant interest from the industry because of their outstanding dimensional stability, excellent ability to dampen vibrations, high recyclability, and good castability. They also exhibit superior stiffness, among other attributes. Nonetheless, magnesium and its alloys face several noteworthy challenges that limit their industrial utilization. These include low resistance to deformation over time, limited stability at high temperatures, restricted malleability, poor ductility, and inadequate resistance to corrosion. This study aims to investigate the phenomenon of stress corrosion cracking in magnesium alloy when exposed to potassium chromate. Addition of Ca showed better mechanical properties. A

Daniel Das, A., Suresh Balaji, R., Marimuthu, S., Manivannan, S.

Study of Corrosion Behavior of Hard Anodized Magnesium Alloy by Dow-17 Process

2023-01-5176

2/23/2024

This study focuses on enhancing the corrosion resistance of AZ91D magnesium alloy, known for its impressive strength-to-weight ratio within the magnesium group. Despite its lightweight properties, the alloy's moderate corrosion and wear resistance have restricted its widespread use. To address this limitation, we explored the application of the Dow 17 process to enable hard anodizing of AZ91D magnesium alloy. Our primary objective is to investigate the impact of hard anodizing on AZ91D magnesium alloy and its potential to mitigate corrosion issues. Hard anodizing results in the formation of a robust oxide film on the alloy's surface. We posit that this oxide film can significantly reduce substrate corrosion, expanding the alloy's utility in various applications. To substantiate our claims, we conducted a comprehensive corrosion performance analysis of AZ91D magnesium alloy, with and without hard anodizing treatment. We employed advanced techniques, including potential dynamic

Marimuthu, S., Manivannan , S., Daniel Das, A., Suresh Balaji, R., Abishek, S., Yogendra Kumar, R.

Anodic Treatment of Magnesium Alloys Acid Type, Thin coat

AMS2479E (Current)

2/16/2024

This specification establishes the engineering requirements for producing an acid-type, anodic coating on magnesium alloys and the properties of the coating.

AMS B Finishes Processes and Fluids Committee

Surface Modification Effect of Magnesium Alloy by Friction Stir Processing

2024-01-5017

2/7/2024

This article explores the impact of friction stir processing (FSP) on the surface modification of magnesium alloy AZ91D. The purpose is to enhance the alloy’s surface qualities and, consequently, improve its performance in various applications. Using FSP, the microstructure and mechanical characteristics of the magnesium alloy are improved through solid-state joining. The study assesses the impact of FSP parameters on the alloy’s surface properties. Researchers adjust parameters such as tool rotation speed and traverse speed to achieve accurate FSP conditions for the intended surface alterations. The surface characteristics of FSP-treated magnesium alloy AZ91D are evaluated through detailed analyses, including microstructure, surface roughness, hardness, and wear resistance. The study considers the effect of FSP on grain development and microhardness, which reflect the immediate impact on surface properties. The study also examines how nano-sized boron nitride (BN) particles are

Prabhu, M. K., Sivaraman, P., Ajayan, Adarsh, Nithyanandhan, T., Ilakiya, P.

Enhancing Microstructural Characteristics and Mechanical Properties in Friction Stir Welding of Thick Magnesium Alloy Plates through Optimization

2024-01-5014

2/6/2024

This research explores friction stir welding (FSW) to examine the mechanical characteristics and microstructure of thick plates manufactured from the Mg-8Al-0.5Zn alloy. Applying the FSW procedure to warm-form an Mg-8Al-0.5Zn alloy for the differential case covering the gears in the car’s automotive technology. Weld quality was significantly improved after using response surface methodology (RSM) to examine various welding parameters and find the best configurations. Improved grain refinement and phase distribution in the weld zone were found in the microstructural study of 11.5 mm thick magnesium alloy plates using RSM-optimized parameters. By dynamic recrystallization, the grain size was reduced to 16 μm, which is fifteen times smaller than the original material, thanks to the good results of single-pass FSW welding. Welding results showing high-quality characteristics such as tensile strength (161.8 MPa), elongation (27.83%), and joint efficiency (98.96%) were achieved using the

Sabari, K., Muniappan, A., Singh, Mandeep

Anodic Treatment of Magnesium Alloys Acid Type, Full Coat

AMS2478F (Current)

12/13/2023

This specification establishes the engineering requirements for producing an acid-type, anodic coating on magnesium alloys and the properties of the coating.

AMS B Finishes Processes and Fluids Committee

Magnesium Alloy, Plate 4.0Y - 2.25Nd - 0.5Zr (WE43C - T5) Precipitation Heat Treated

AMS4371C (Current)

12/13/2023

This specification covers a magnesium alloy in the form of rolled plate from 0.500 up to 6.0 inches (12.7 to 152.4 mm), inclusive (see 8.5).

AMS D Nonferrous Alloys Committee

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