典型文献
Microstructure evolution and age-hardening response in Mg-Sn-Sm alloys under a wide range of Sm/Sn ratio
文献摘要：
The microstructure evolution and age-hardening response for different Sm/Sn ratios (0-2.55, in wt.％) of Mg-Sn-Sm alloys were investigated. The second phase formation in as-cast alloys and the Mg3Sm precipitates formed in aged alloys were characterized using XRD, FESEM and HAADF-STEM with EDS techniques. Results indicate that the Sm/Sn ratio has a great influence on the phase constitution, α-Mg grain size and age-hardening response. With the increment of Sm/Sn ratio, Mg41Sm5 and thermally stable MgSnSm phases precipitate. When the Sm/Sn ratio is about 1.19, the secondary dendrite arm spacing of α-Mg grains significantly decreases. Furthermore, the alloy with Sm/Sn ratio up to 2.55 exhibits the highest age-hardening response, the hardness value increases from 52 HB at solution-treated condition to 74 HB at peak-aged condition (ageing at 220 ℃ for a short time of 4 h). This is attributed to the large volume fraction of needle-like Mg3Sm precipitates formed in the α-Mg matrix during ageing treatment, which results in a significant precipitation strengthening effect.
文献关键词：
中图分类号：
作者姓名：
Feng Liu;Wen-xin Hu;Zheng-hua Yang;Wei Wang;Wei He
作者机构：
State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou 014030,Inner Mongolia,China;Baotou Research Institute of Rare Earths,Baotou 014030,Inner Mongolia,China
文献出处：
引用格式：
[1]Feng Liu;Wen-xin Hu;Zheng-hua Yang;Wei Wang;Wei He-.Microstructure evolution and age-hardening response in Mg-Sn-Sm alloys under a wide range of Sm/Sn ratio)[J].中国铸造,2022(03):211-217
A类：
Mg3Sm,MgSnSm
B类：
Microstructure,evolution,hardening,response,alloys,under,wide,range,microstructure,different,ratios,wt,were,investigated,formation,cast,precipitates,formed,aged,characterized,using,FESEM,HAADF,STEM,EDS,techniques,Results,indicate,that,great,influence,constitution,size,With,increment,Mg41Sm5,thermally,stable,phases,When,about,secondary,dendrite,arm,spacing,grains,significantly,decreases,Furthermore,up,exhibits,highest,hardness,value,increases,from,HB,solution,treated,condition,peak,ageing,short,This,attributed,large,volume,fraction,needle,like,matrix,during,treatment,which,results,precipitation,strengthening,effect
AB值：
0.486902
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