添加Ga对挤压态TAZ811-1Ca合金组织和力学性能的影响
Effect of Ga Addition on Microstructure and Mechanical Properties of Extruded TAZ811-1Ca Alloy
王柏鑫 1张忠涛 2程大勇 2张研研 1李航 3许春香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
- 2. 金龙精密铜管集团股份有限公司,重庆 404188
- 3. 太原理工大学 材料科学与工程学院,山西 太原 030024;金龙精密铜管集团股份有限公司,重庆 404188
- 折叠
摘要
以挤压态TAZ811-1Ca合金为对象,采用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射(XRD)、室温拉伸试验等研究了不同含量Ga(1wt%、3wt%)的添加对合金组织和性能的影响.研究表明:添加Ga元素可以细化TAZ811-1Ca合金晶粒,且随着Ga含量增大细化效果增强.此外,Ga元素可以固溶于α-Mg基体产生固溶强化,并且促进挤压过程中纳米尺寸Mg2Sn相的动态析出,从而提高合金的力学性能.当Ga含量为 3wt%时,挤压态合金的抗拉强度、屈服强度和伸长率达到最佳值,分别为 316.5 MPa、210 MPa和 20.71%.
Abstract
Taking the as-extruded TAZ811-1Ca alloy as object,the effect of different Ga contents(1wt%,3wt%)on the microstructure and properties of extruded TAZ811-1Ca alloy was studied by optical microscopy(OM),scanning electron microscopy(SEM),X-ray diffraction(XRD)and tensile test at room temperature.The results indicate that the Ga addition can refine the grain of TAZ811-1Ca alloy,and the refinement effect is enhanced with the Ga content increasing.In addition,Ga element can be dissolved in α-Mg matrix resulting in solution strengthening and also promotes the dynamic precipitation of nano-sized Mg2Sn phase during extrusion,which leads to the improvement of alloy mechanical properties.When Ga content is 3wt%,the tensile strength,yield strength and elongation of the extruded alloy reach the optimal values,which are 316.5 MPa,210 MPa and 20.71%,respectively.
关键词
TAZ811合金/挤压变形/微观组织/力学性能Key words
TAZ811 alloy/extrusion deformation/microstructure/mechanical performance引用本文复制引用
基金项目
国家自然科学基金(51901153)
山西省应用基础研究计划(201901D211096)
出版年
2024
NETL
NSTL
万方数据