Mg-Bi系合金的研究进展

Research progress of Mg-Bi based alloys

合金元素Bi的价格较低,在镁中有较高的固溶度,随着温度降低,其固溶度减小,析出Mg_(3)Bi_(2)相,提高了镁的力学性能,因此Mg-Bi系合金具有良好的固溶和时效硬化潜力。在Mg-Bi系合金中加入Sn、Mn、Al、Ca、Zn等元素,改善合金组织,能够进一步提高合金的力学性能及耐腐蚀性。文中介绍了国内外学者对Mg-Bi系合金的研究进展,在总结Mg-Bi二元合金研究成果基础上,系统的概述了Mg-Bi-Sn系、Mg-Bi-Mn系、Mg-Bi-Al系、Mg-Bi-Ca系、Mg-Bi-Zn系等合金的组织和性能,综述了合金化对合金第二相、晶粒尺寸、织构、动态再结晶的影响,阐述了合金元素种类、添加量及热加工参数与合金力学性能的关系。总结了Mg-Bi系合金研究中存在的问题,并对今后的研究工作进行了展望。

The price of alloying element Bi is low,and it has a high solid solubility in magnesium,and with the decrease of temperature,its solid solubility decreases,and the Mg_(3)Bi_(2) phase is precipitated,which improves the mechanical properties of magnesium.Therefore,Mg-Bi alloys have good solution and aging hardening potential.The addition of Sn,Mn,Al,Ca,Zn and other elements to Mg-Bi alloy can modulate the alloy microstructure and further increase the mechanical properties and corrosion resistance of the alloy.In this paper,the research progress of Mg-Bi alloys was introduced,and on the basis of summarizing the research achievements of Mg-Bi binary alloys,the microstructure and properties of Mg-Bi-Sn alloys,Mg-Bi-Mn alloys,Mg-Bi-Al alloys,Mg-Bi-Ca alloys,and Mg-Bi-Zn alloys were systematically summarized,and the effects of alloying on the second phase,grain size,texture and dynamic recrystallization of alloys were reviewed.The effects of alloying element types,addition amounts and hot working parameters on the mechanical properties of alloys were described,and the future research is prospected.The existing problems in the study of Mg-Bi alloys were summarized,and the future research was prospected.