Effects of Vanadium on Modification of Iron-Rich Intermetallics and Mechanical Properties in A356 Cast Alloys with 1.5 wt.% Fe

被引:0
|
作者
Bo Lin
Haoyu Li
Rui Xu
Huaqiang Xiao
Weiwen Zhang
Shaobo Li
机构
[1] Gui Zhou University,Key Laboratory of Advanced Manufacturing Technology, Ministry of Education
[2] Gui Zhou University,School of Mechanical Engineering
[3] South China University of Technology,School of Mechanical and Automotive Engineering
来源
Journal of Materials Engineering and Performance | 2019年 / 28卷
关键词
aluminum; casting and solidification; intermetallics;
D O I
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中图分类号
学科分类号
摘要
Formation of Fe-rich intermetallics and mechanical properties of vanadium-modified A356 cast alloys with 1.5 wt.% Fe were investigated using image analysis, scanning electron microscopy, differential scanning calorimetry, and a tensile test. The results showed that V content has no apparent influence on α-Al grain size in A356 alloys with high Fe content. Also, 0.8 wt.% V is beneficial for improving mechanical properties in A356 cast alloys with high Fe content. Specifically, these results can be attributed to the formation of Chinese script or block α-Fe phases, refined needle-like β-Fe (Al5FeSi), and decreased porosities. An excessive amount of V deteriorates mechanical properties of alloys because it leads to VSi2 formation, large sized iron-rich intermetallics, and increased porosities.
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页码:475 / 484
页数:9
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