Influence of Sand-Casting Parameters on Microstructure and Properties of Magnesium Alloys

Archives of Metallurgy and Materials

M. Stopyra¹  A. Kiełbus¹  R. Jarosz² 

[1] Silesian University of Technology, Katowice, Poland;Zm Wsk Rzeszów, Poland

关键词: Keywords : Mg alloys;    sand casting;    modification;    Elektron 21;    WE43;    properties;    fluidity;   

DOI  :  10.2478/amm-2013-0050

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The paper present the influence of modifying process on chemical composition, microstructure, and selected properties of Mg alloys. Two sand-casting creep-resistant alloys, Elektron 21 and WE43, were analyzed in various forms: without modifiers, with the amount of modifier suggested by the producer, and with this amount increased by 50% and 100%. The volume fraction of eutectic areas, tensile strength, and yield strength were measured and the fluidity and linear contraction were analyzed. The research shows that, in contrast to what is widely assumed to be a positive influence of rare-earth elements on Mg alloys properties, a large increase in the amount of modifiers does not always lead to an improvement in the alloy properties. However, the results are tentative because they may have been influenced by the melting technology used, which can be improved. Rare-earth elements tend to react with fluxes, which could lead to a decrease in mechanical properties and fluidity. More research is planned wherein the alloys are melted under a protective atmosphere.

【 授权许可】

Unknown