可时效强化<strong>Mg-Sn</strong>基合金的研究进展

可时效强化Mg-Sn基合金的研究进展

石章智,张敏,黄雪飞,刘雪峰,张文征

Research Progress in Age-Hardenable Mg-Sn Based Alloys

Zhangzhi SHI,Min ZHANG,Xuefei HUANG,Xuefeng LIU,Wenzheng ZHANG

表2 合金元素对Mg-Sn基合金时效强化的作用

Table 2 Effects of alloying elements on age-hardening responses of Mg-Sn based alloys

Effect	Mechanism	Alloying element
Positive	Promote nucleation of Mg₂Sn Refine Mg₂Sn Promote inclined Mg₂Sn morphology Form precipitates other than Mg₂Sn	Na, Zn, Ag, Hf, In+Li Zn, Al, Cu Zn Zn, Ag, Al, Mn



Negative	Decrease volume fraction of Mg₂Sn	RE, Ca, Sr, Li
Negligible	Form thermally stable Sn-free phase difficult to be soluted in Mg matrix	Si, Sb
Uncertain	Form Sn-containing phase yet not sure whether can be soluted in Mg matrix or not	Ba, Sc