热处理对Mg-Gd-Y-Zn-Ti合金微观组织和性能的影响
Effects of Heat Treatment on Microstructure and Properties of Mg-Gd-Y-Zn-Ti Alloy
郅玄乐 1丁志兵 1张帅 1郭文敏 1陈东瑞1
作者信息
- 1. 邵阳学院机械与能源工程学院,高效动力系统智能制造湖南省重点实验室,邵阳 422000
- 折叠
摘要
以铸态、固溶态和时效态 Mg-Gd-Y-Zn-Ti稀土镁合金为对象,采用X射线衍射仪(XRD)、扫描电镜(SEM)以及电子拉伸试验机分析了热处理对 Mg-12Gd-x Y-1Zn-0.6Ti(质量分数,%)合金(x=0,0.4,0.8,1.2,%)的微观组织、微区成分、物相组成以及力学性能的影响.结果表明,铸态Mg-12Gd-x Y-1Zn-0.6Ti合金中存在LPSO相,且LPSO相为Mg12Gd5(Zn,Y).添加0.8%的Y的合金力学性能最优,其抗拉强度为222 MPa,屈服强度为149 MPa,伸长率为3.76%.固溶处理后力学性能得到了一定的提升,抗拉强度达到了272 MPa,屈服强度达到了188 MPa,伸长率达到了5.4%.加Y合金的峰时效响应强烈,峰时效态Mg-12Gd-1Zn-0.6Ti-0.8Y合金的力学性能最佳,其抗拉强度达到了388 MPa,屈服强度为267 MPa,伸长率为6.44%.
Abstract
Effects of heat treatment on microstructure,micro-composition,phase composition and mechanical proper-ties of Mg-12Gd-x Y-1Zn-0.6Ti alloy(x=0,0.4,0.8,1.2,%)were analyzed at as-cast,solid solution and aged treat-ment by X-ray diffractometer(XRD),scanning electron microscopy(SEM)with energy spectrum and electron tensile testing machine.The results indicate that LPSO phase is present in as-cast Mg-12Gd-x Y-1Zn-0.6Ti alloy,which is composed of Mg12Gd5(Zn,Y).The mechanical properties of alloy with 0.8%Y is desirable,where the tensile strength,yield strength and elongation reach 222 MPa,149 MPa,and 3.76%,respectively.The mechanical properties of alloy after solution treatment are improved to a certain extent,where the tensile strength,yield strength and elongation reach 272 MPa,188 MPa,and 5.4%,respectively.The peak aging response of alloy with Y addition is strong,and the mechanical properties of peak-aged Mg-12Gd-0.8Y-1Zn-0.6Ti are desirable,where the tensile strength reach yield strength and elongation are 388 MPa,267 MPa and 6.44%,respectively.
关键词
Mg-Gd-Y-Zn-Ti合金/稀土镁合金/热处理/力学性能Key words
Mg-Gd-Y-Zn-Ti Alloy/Rare Earth Magnesium Alloys/Heat Treatment/Mechanical Properties引用本文复制引用
基金项目
湖南省自然科学基金联合资助项目(2022JJ50172)
湖南省普通高等学校教学改革研究资助项目(HNJG-2022-1018)
湖南省研究生科研创新资助项目(CX20221313)
邵阳市科技创新指导性资助项目(2022GX4073)
邵阳学院学位与研究生教学改革研究资助项目(2022JGSY003)
邵阳学院研究生科研创新资助项目(CX2022SY010)
出版年
2024
NETL
NSTL
万方数据