大变形挤压下AZ61M-Cu合金组织和力学性能分析
Analysis of Microstructure and Mechanical Properties of AZ61M-Cu Alloy under Large Deformation Extrusion
陈闻欣1
作者信息
- 1. 永城职业学院机电工程系,河南 永城 476600
- 折叠
摘要
分别对AZ61M与AZ61M+1.0Cu两种合金进行了实验测试,对其实施均匀化处理并通过两步法进行复合挤压剪切处理,对比了加入Cu引起的合金微观结构与力学特性变化.研究结果表明:AZ61M+1.0Cu合金的晶粒尺寸为1.4 μm,小尺寸晶界基本分布于0.5～1.0 μm范围内的DRX晶粒.经过热挤压剪切处理后,合金组织发生了位错回复,原先的位错胞转变为DRX晶粒.AZ61M+1.0Cu合金获得了比AZ61M合金更大的力学强度,伸长率变化不明显.该研究有助于提高镁合金的成型质量,为后续的挤压工艺优化奠定一定的理论基础.
Abstract
The microstructure and mechanical properties of AZ61M and AZ61M+1.0Cu alloys were tested by homogenization treatment and composite extrusion shear treatment by two-step method,and the changes of microstructure and mechanical properties caused by Cu addition were compared.The results show that the grain size of AZ61M+1.0Cu alloy is 1.4 μm,and the small grain boundaries are mainly distributed in the DRX grains in the range of 0.5～1.0 μm.After hot extrusion shear treatment,dislocation recovery occurs in the alloy structure,and the original dislocation cells are transformed into DRX grains.The mechanical strength of AZ61M+1.0Cu alloy is higher than that of AZ61M alloy,and the change of elongation is not obvious.The research is helpful to improve the forming quality of magnesium alloy and lay a theoretical foundation for the subsequent extrusion process optimization.
关键词
大变形挤压/镁合金/微观组织/力学性能Key words
large deformation extrusion/magnesium alloy/microorganization/mechanical properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据