Modification of AZ91 Mg Alloys for High Temperature Applications

Pai, B.C.; Pillai, U.T.S.; Manikandan, P.; Srinivasan, A.

doi:10.1007/s12666-012-0166-1

Cited by 43 publications

(15 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Addition of rare earth elements to magnesium and magnesium alloys brings several improvements to the properties of these materials. Rare earths are able to improve the mechanical properties of magnesium-based materials at ambient and elevated temperatures due to the precipitation of stable RE-Mg intermetallic compounds (Maruyama et al, 2002;Pai et al, 2012). These intermetallics can act as obstacles to dislocations, therefore improving the creep resistance of the material (Witte et al, 2008;Pai et al, 2012).…”

Section: Alloying Elementsmentioning

confidence: 99%

Rare Earth Based Magnesium Alloys—A Review on WE Series

2022

View full text Add to dashboard Cite

Magnesium and magnesium alloys have attracted growing attention over the last decades as lightweight materials for a wide range of applications. In particular, WE series magnesium alloys have experienced growing interest over the last years due to their favourable mechanical properties at room and elevated temperatures. In addition, it has been reported that these rare earth-containing alloys possess superior corrosion resistance compared to other commonly used magnesium alloys, such as AZ series. This review aims at providing a concise overview of the research efforts made during recent years regarding the properties of WE series magnesium alloys (e.g., mechanical properties, corrosion behaviour), how these properties can be enhanced by controlling the microstructure of these materials, and the role of specific alloying elements that are used for the WE series. The widespread use of these materials has been limited, mainly due to their susceptibility to corrosion. Thus, in the present review, strong emphasis has been given to recent work studying the corrosion behaviour of the WE series alloys, and to protective strategies that can be employed to mitigate their degradation.

show abstract

Section: Alloying Elementsmentioning

confidence: 99%

Rare Earth Based Magnesium Alloys—A Review on WE Series

2022

View full text Add to dashboard Cite

show abstract

“…Üretilen tozların (atomizasyon ünitesinden alındığı şekliyle) Dv (10) Üretilen tozların genellikle ligamet, damlamsı, çubuksu, pulsu ve küresel şekilde olduğu Şekil 5'ten anlaşılmaktadır. [26,27].…”

Section: Sonuçlar Ve Tartişmalar (Results and Discussion)unclassified

Gaz atomizasyonu yöntemi ile üretilen AM60 magnezyum alaşım tozunun toz karakterizasyonu üzerine gaz basıncının etkisinin araştırılması

Çetin

Akkaş

Boz

2019

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

View full text Add to dashboard Cite

Production of magnesium alloy AM60 Powder by gas atomization method  The effect of gas pressure in powder production by gas atomization method  Powder characterization of magnesium alloy AM60 powder Figure A. Production process diagram and produced AM60 powder Purpose: In this study, AM60 magnesium alloy powder produced by gas atomization method is produced. As a result of the literature research, there is no study about the production of AM60 magnesium alloy powder by gas atomization method. For this purpose, AM60 magnesium alloy powder production was studied in order to fill this gap in literature. Theory and Methods: Experimental studies were carried out in the gas atomization unit in Karabuk University Technology Faculty Manufacturing Engineering Department. The experiments were carried out at a constant temperature of 820 ° C with a 2 mm nozzle diameter and 4 different gas pressures (5, 15, 25, 35 bar). Argon gas was used to atomize the melt. In order to determine the shape of the AM60 powder produced, scanning electron microscope (SEM), XRD, XRF and SEM-EDX analysis were used to determine the phases formed in the internal structures of the powders and the% ratios of these phases, and laser measuring device was used for the powder size analysis. Hardness tests were performed to determine the mechanical properties of the powders produced. Results: As a result of experimental studies, it was observed that the size of the powder decreased due to the increase of gas pressure. It has been found that gas pressure has a significant effect on powder size and shape in powder production by gas atomization method. Powder produced is generally observed in the form of ligament, droplet, acicular, flake and spherical shape. As a result of the XRD analysis, α (Mg main matrix) phase, β phase Mg17Al12 and very small amount of Mn were detected in the structure. The hardness of the powders produced is higher than the hardness of ingot material (67 HV0,025). Conclusion: In the gas atomization unit, the production of magnesium alloy AM60 powder was carried out by the gas atomization method, which is widely used in the production of powders. In the production of gas atomized magnesium alloy AM60 powder, the smallest powder size was measured as 820 °C, 2 mm nozzle diameter and 35 bar pressure as 41.95 µm. As a result of XRF analysis, it was determined that the AM60 powder produced and the chemical composition of the ingot material were close.

show abstract

“…But typical applications of magnesium alloys are restricted due to low modulus, inherent brittleness, lower strength at elevated temperature and poor high temperature tribological performance. Hence applications of Mg alloys are restricted in certain specific elevated temperature applications like engine parts (~ 200°C), bearing of aerospace, IC engines (~ 175°C) and cylinder liners (Pai et al, 2012). Hence researchers are focusing towards improvement of properties of magnesium alloys so that their application areas become wider.…”

Section: Introductionmentioning

confidence: 99%

“…Labib et al discloses that use of ceramic based SiC particle possess significant less wear rate compared to pure magnesium at high temperatures (100-200°C). Accordingly in the current study tungsten carbide (WC) nanoparticles are considered because of its high hardness (1400 HV), good shock absorption capability, high melting point, noteworthy oxidation resistance etc (Pal et al, 2018). Recently, have examined magnesium based nanocomposites having WC as reinforcement and studied wear behavior at cryogenic domain.…”

Section: Introductionmentioning

confidence: 99%

Design of experiment analysis of elevated temperature wear of Mg-WC nano-composites

2021

View full text Add to dashboard Cite

Current study explores the effect of selected process parameters i.e. wt.% of reinforcement (A), elevated temperature (B) and load (C) on wear characteristics of Mg-WC nanocomposites using Taguchi robust design concept. Ultrasonic treated stir casting is employed to synthesize nanocomposites. Three levels for every factor are taken into consideration and accordingly L27 orthogonal array (OA) is used for minimization of wear rate. Main effect plot is generated to investigate the important parameters and optimality is also predicted from the main effect plot. Optimal condition for minimum wear rate is 2wt.% of WC, 100°C temperature and 20N load (A3B1C1). Interaction plots are generated to scrutinize the interaction outcome between selected parameters. ANOVA study is executed to evaluate significant parameters and their effective handout on output. Current investigation reveals, Wt.% of WC is the most significant factor while temperature and load are moderately significant. Among the interacting parameters, interaction between wt.% of WC & temperature (A×B) has moderate significance. Wt.% of WC (A) has 43.135% contribution while temperature (B), load (C) and interaction between wt.% of WC & temperature (A×B) have 26.623%, 19.037% and 5.639% contribution respectively. Residual plots for wear rate are discussed and confirmation test finally helps to validate present experimental model. S/N ratio is improved by 4.411 dB (48.60%) than the initial condition.

show abstract

Modification of AZ91 Mg Alloys for High Temperature Applications

Cited by 43 publications

References 20 publications

Rare Earth Based Magnesium Alloys—A Review on WE Series

Rare Earth Based Magnesium Alloys—A Review on WE Series

Gaz atomizasyonu yöntemi ile üretilen AM60 magnezyum alaşım tozunun toz karakterizasyonu üzerine gaz basıncının etkisinin araştırılması

Design of experiment analysis of elevated temperature wear of Mg-WC nano-composites

Contact Info

Product

Resources

About