ECAP和时效对Mg-4Zn-1Mn-0.5Ca合金组织和性能的影响
Effects of ECAP and Aging on Microstructure and Properties of Mg-4Zn-1Mn-0.5Ca Alloy
王永祥 1李永峭 1虞佳雯 1王利飞1
作者信息
- 1. 太原理工大学 材料科学与工程学院,山西 太原 030024
- 折叠
摘要
将铸态Mg-4Zn-1Mn-0.5Ca合金在 300℃热挤压成棒材,对棒材进行 180℃时效处理和 200℃等通道转角挤压(ECAP).研究了热挤压合金、ECAP 8 道次合金和时效后ECAP 8 道次合金的组织和性能.随后对试样进行室温和 150℃低温单轴拉伸.结果表明:8 道次ECAP后合金比热挤压态合金具有更细、更均匀的晶粒组织,同时提高了合金的室温屈服强度.时效后ECAP 8 道次合金的 150℃断裂伸长率比未时效ECAP8 道次合金提高 17.4%,说明时效处理对合金性能起着重要作用.
Abstract
The as-cast Mg-4Zn-1Mn-0.5Ca alloy was hot-extruded into rods at 300℃,and the rods were subjected to aging treatment at 180℃and equal channel angle pressing(ECAP)at 200℃.The microstructure and properties of the hot extrusion alloy,ECAP 8-pass alloy and ECAP 8-pass alloy after aging were studied.Subsequently,the samples were subjected to uniaxial tensile at room temperature and 150℃.The results show that the grain structure of the alloy after 8 passes of ECAP is finer and more uniform than that of the hot extruded alloy,and the yield strength of the alloy at room temperature is improved.The 150℃elongation at break of the aged alloy after 8-pass ECAP is 17.4%higher than that of the unaged ECAP 8-pass alloy,which indicates that the aging treatment plays an important role in the properties of the alloy.
关键词
Mg-4Zn-1Mn-0.5Ca合金/时效/等通道转角挤压/低温拉伸Key words
Mg-4Zn-1Mn-0.5Ca alloy/aging treatment/equal channel angle pressing(ECAP)/low-temperature tension引用本文复制引用
基金项目
国家自然科学基金(51704209)
中央引导地方科技发展专项(YDZJSX2021A010)
山西省重点研发计划(201803D421086)
山西省专利实施推广专项(20200718)
出版年
2024
NETL
NSTL
万方数据