摘要
晶粒细化可以有效改善镁合金的力学性能。基于此,以Mg-1.5Zn-0.2Ca合金作为研究对象,通过中低温挤压变形工艺对Mg-1.5Zn-0.2Ca合金组织进行调控,进而对其变形后的组织及性能进行分析。结果表明:随着挤压温度降低,Mg-1.5Zn-0.2Ca合金的塑性变形机制发生转变,变形后的晶粒尺寸逐渐减小,综合力学性能增强。280℃挤压变形时,合金以基面滑移及孪生协调变形为主,动态再结晶后的平均晶粒尺寸约为5.3μm,此时合金的屈服强度为95 MPa,抗拉强度为186 MPa,延伸率为22%。
Grain refinement can effectively improve the mechanical properties of magnesium alloy.Based on this,study was conducted on the Mg-1.5Zn-0.2Ca alloy and the microstructure of its alloys was regulated by moderate temperature extrusion process.The analysis of extruded alloy showed that,with decreasing of extrusion temperature,the deformation model of Mg-1.5Zn-0.2Ca alloy gradually changes,at the same time the grain size of extruded alloys also decreases,and the extruded alloys exhibit much better mechanical properties.The alloy is dominated by combination of basal slip and twining when extruded at 280℃,gaining the dynamic recrystallized(DRXed)grains for average size of 5.3μm,while the yield strength,ultimate tensile strength and elongation are 95 MPa,186 MPa and 22%,respectively.
作者
张鸿飞
丁雨田
雷健
沈悦
陈建军
高钰璧
ZHANG Hongfei;DING Yutian;LEI Jian;SHEN Yue;CHEN Jianjun;GAO Yubi(School of Material Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2022年第3期172-176,共5页
Materials Reports
基金
兰州理工大学红柳一流学科建设计划项目。
