典型文献
Regulative effect of Mg/Si ratio on microstructure evolution and mechanical properties of cast Al-Li-Mg-Si alloys
文献摘要：
The effect of the Mg/Si ratio of Al-2.5Li-1Cu-0.8Mg-0.8Si, Al-2.5Li-1Cu-1.6Mg-0.8Si, and Al-2.5Li-1Cu-2.4Mg-0.8Si alloys on the microstructure evolution and mechanical properties was investigated. The results show that the primary phases and their morphologies in the as-cast alloys are found to vary with the Mg/Si ratio. The improvement of Mg/Si ratio of as-cast alloys promotes the formation of Mg2Si primary phase at the expense of the AlLiSi primary phase. Moreover, a tiny amount of TB-Al7.5Cu4Li phase transforms into S-Al2CuMg phase with the increase of Mg content. In addition, the increase of Mg/Si ratio also causes the Cu-rich intergranular phase distributed along crystal boundary to Si-rich intergranular phase. After ageing treatment, the precipitation sequence as a function of Mg/Si ratio is as follows: δ/δ'+AlLiSi (Mg/Si is ～1) → δ/δ'+β'-Mg2Si+AlLiSi (Mg/Si is ～2) → δ/δ'+β'-Mg2Si (Mg/Si is ～3). A good combination of strength and ductility can be obtained in Al-2.5Li-1Cu-2.4Mg-0.8Si alloy after solution and ageing. The rod-like β'-Mg2Si precipitate has a positive influence on the comprehensive mechanical properties of the alloy.
文献关键词：
中图分类号：
作者姓名：
Xue-jian Zhang;Hong-wei Wang;Feng-bai Ye;Chun-ming Zou;Zun-jie Wei
作者机构：
National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of Technology,Harbin 150001,China;Shanxi Pingyang Industry Machinery Co.,Ltd.,Pingyang 030000,Shanxi,China
文献出处：
引用格式：
[1]Xue-jian Zhang;Hong-wei Wang;Feng-bai Ye;Chun-ming Zou;Zun-jie Wei-.Regulative effect of Mg/Si ratio on microstructure evolution and mechanical properties of cast Al-Li-Mg-Si alloys)[J].中国铸造,2022(01):81-88
A类：
Regulative,AlLiSi,5Cu4Li,+AlLiSi,Mg2Si+AlLiSi
B类：
effect,ratio,microstructure,evolution,mechanical,properties,cast,alloys,5Li,1Cu,8Mg,8Si,6Mg,4Mg,was,investigated,results,show,that,primary,phases,their,morphologies,are,found,vary,improvement,promotes,formation,expense,Moreover,tiny,amount,TB,Al7,transforms,into,Al2CuMg,increase,content,In,addition,also,causes,rich,intergranular,distributed,along,crystal,boundary,After,ageing,treatment,precipitation,sequence,function,follows,good,combination,strength,ductility,can,be,obtained,after,solution,rod,like,precipitate,positive,influence,comprehensive
AB值：
0.413003
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