挤压速度对Mg-6Zn-0.5Gd合金织构和力学性能的影响
The Effect of Extrusion Speed on the Texture and Mechanical Properties of Mg-6Zn-0.5Gd Alloy
龚闪闪 1李放2
作者信息
- 1. 郑州工业应用技术学院机电工程学院,河南 新郑 450064
- 2. 商丘技师学院机电系,河南 商丘 476000
- 折叠
摘要
通过冶金制备方法得到Mg-6Zn-0.5Gd合金,在热挤压变形过程中,测试挤压速度对其织构和力学性能的影响.结果表明:提高挤压速率后,合金组织发生动态再结晶,晶粒随机取向的合金组织,其织构强度降低,在合金组织内形成了较少的小角度晶界,同时也会降低拉伸强度与屈服强度,获得更大的伸长率,在断口部位形成了大量韧窝,表现为塑性断裂特征.
Abstract
Mg-6Zn-0.5Gd alloy was obtained by metallurgical preparation method,and the effect of extrusion speed on its texture and mechanical properties was tested during hot extrusion deformation.The results show that after increasing the extrusion rate,the alloy structure undergoes dynamic recrystallization,and the texture strength of the alloy structure with randomly oriented grains decreases,forming fewer small angle grain boundaries within the alloy structure.At the same time,it also reduces the tensile strength and yield strength,obtaining greater elongation,and forming a large number of ductile dimples at the fracture surface,exhibiting plastic fracture characteristics.
关键词
挤压速度/Mg-6Zn合金/织构/力学性能Key words
extrusion speed/Mg-6Zn alloy/texture/mechanical property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据