4.5 Article

High Temperature Behavior of Al-7Si-0.4Mg Alloy with Er and Zr Additions

期刊

METALS
卷 11, 期 6, 页码 -

出版社

MDPI
DOI: 10.3390/met11060879

关键词

Al-7Si-0; 4Mg (A356 alloy); erbium; zirconium; creep; microstructural stability

向作者/读者索取更多资源

This study focuses on investigating the creep behavior of Al-7Si-0.4Mg (A356) alloy with small additions of Er and Zr at high temperatures. Alloys containing both Er and Zr displayed improved creep performance. Fractographic and microstructural analyses were performed to understand the role of eutectic silicon, coarse intermetallics, and alpha-Al matrix ductility in the alloys' performance.
In recent years, many efforts have been devoted to the development of innovative Al-based casting alloys with improved high temperature strength. Research is often oriented to the investigation of the effects of minor element additions to widely diffused casting alloys. The present study focuses on Al-7Si-0.4Mg (A356) alloy with small additions of Er and Zr. Following previous scientific works on the optimization of heat treatment and on tensile strength, creep tests were carried out at 300 degrees C under applied stress of 30 MPa, a reference condition for creep characterization of innovative high-temperature Al alloys. The alloys containing both Er and Zr displayed a lower minimum creep strain rate and a longer time to rupture. Fractographic and microstructural analyses on crept and aged specimens were performed to understand the role played by eutectic silicon, by the coarse intermetallics and by alpha-Al matrix ductility. The creep behavior in tension of the three alloys has been discussed by comparing them to tension and compression creep curves available in the literature for Al-7Si-0.4Mg improved by minor elemental additions.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据