Castability and mechanical properties of new 7xxx aluminum alloys for automotive chassis/body applications

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• 作者：Jesik Shin^a ; ^{jsshin@kitech.re.kr} ; Taehyeong Kim^a ; DongEung Kim^a ; Dongkwon Kim^b ; Kitae Kim^a
• 关键词：7xxx aluminum alloy ; Alloy design ; Microalloying ; Hot tear susceptibility ; Fluidity ; Mechanical properties
• 刊名：Journal of Alloys and Compounds
• 出版年：2017
• 出版时间：25 March 2017
• 年：2017
• 卷：698
• 期：Complete
• 页码：577-590
• 全文大小：4059 K
• 卷排序：698

文摘

New Cu–free medium Mg 7xxx aluminum alloys with minor Ti and Zr are investigated. These alloys show an excellent combination of strength, ductility, and castability. With increasing Ti content up to 0.2%, the HTS decreases, eventually reaching zero. The addition of 0.2% Ti–0.1% Zr improves alloy fluidity and prevents hot tearing. The mechanisms of fluidity and HTS dependence on Mg, Si and Ti contents are proposed.