摘要
以Mg-8%Li-3%Al合金为基体,研究合金化元素Ca以及Ca与电磁搅拌复合作用对其凝固组织和力学性能的影响,并探讨其化学成分、组织结构和力学性能间的关系。结果表明:合金化元素Ca以及Ca与电磁搅拌复合作用都能改善Mg-8%Li-3%Al合金的凝固组织和力学性能;当铸态合金中Ca含量为0.5%(质量分数)时,合金中β相细小均匀,室温抗拉强度和伸长率分别达到188.93MPa和11.35%;施加80V电磁场电压以及加入0.5%Ca后,晶粒组织均匀有序,布氏硬度、抗拉强度和伸长率分别为67.5HB、203.8MPa和7.7%。
The effects of Ca and combined electromagnetic stirring and Ca on the microstructures and mechanical properties of Mg-8%Li-3%Al alloys were studied,and the relationships among the chemical composition,microstructures and mechanical properties were discussed.The results show that both Ca and combined electromagnetic stirring and Ca improve the microstructures and mechanical properties of Mg-8%Li-3%Al alloys.Adding 0.5%Ca into the as-cast alloys,theβphase becomes thinner,and the tensile strength and elongation reach to 188.93 MPa and 11.35%,respectively.The microstructure is fine and uniform,and the Brinell hardness,tensile strength,and elongation are 67.5HB,203.8 MPa and 7.7%at electromagnetic stirring of 80 V combined with 0.5%Ca.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第6期1060-1068,共9页
The Chinese Journal of Nonferrous Metals
基金
国家高技术研究发展计划资助项目(2009AA03Z525)
教育部新世纪优秀人才支持计划资助项目(NCET-08-0080)
辽宁省自然科学基金资助项目(20082172)
