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Influence of Li addition on mechanical property and aging precipitation behavior of A1-3.5Cu-1.5Mg alloy 被引量:1
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作者 邓运来 杨金龙 +2 位作者 李思宇 张劲 张新明 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第6期1653-1658,共6页
The influence of Li addition on mechanical property and aging precipitation behavior of Al-3.5Cu-1.5Mg alloy was investigated by tensile test,scanning electron microscopy(SEM),transmission electron microscopy(TEM)... The influence of Li addition on mechanical property and aging precipitation behavior of Al-3.5Cu-1.5Mg alloy was investigated by tensile test,scanning electron microscopy(SEM),transmission electron microscopy(TEM) and high resolution transmission electron microscopy(HRTEM).The results show that the tensile strength can be significantly improved with the slightly decreased ductility and the form of fracture morphology is converted from ductile fracture into ductile/britde mixed fracture by adding 1.0%Li.Besides,the peak aging time at 185 ℃ is delayed from 12 to 24 h and the main precipitation phase S(Al2CuMg) is converted into S'(Al2CuMg)+δ(Al3Li),while the formation of S'(Al2CuMg) is delayed. 展开更多
关键词 aluminum alloy al-3.5Cu-1.5mg alloy LI aging behavior mechanical properties
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