激光选区熔化制备Ti-15Mo合金微观结构和力学性能的各向异性
Anisotropy of Microstructure and Mechanical Properties of Ti-15Mo Alloy Prepared by Selective Laser Melting
肖湘睿 1陈荐 1周立波 1李聪1
作者信息
- 1. 长沙理工大学能源与动力工程学院,长沙 410114
- 折叠
摘要
采用激光选区熔化(SLM)技术在不同构建方向(与水平方向成0°,30°,45°,60°,90°)下制备Ti-15Mo合金,分析了其微观结构和力学性能的各向异性.结果表明:当构建方向由0°变为90°时,合金的织构取向变化为(001)→(101)→(111);0°和90°构建方向的合金中2°～10°小角度晶界的体积分数较低;0°,30°,45°,60°和90°构建方向的合金的平均晶粒尺寸分别为59.95,33.47,99.98,42.63,72.41 μm,平均显微硬度分别为 313.92,327.29,294.11,327.48,311.67 HV;0°,45°,60°,90°构建方向制备的合金的抗拉强度分别为866.35,898.78,1 055.97,913.7 MPa,屈服强度分别为 716.40,767.98,1 027.45,808.83 MPa,断后伸长率分别为 14.00％,18.97％,12.51％和14.29％.不同构建方向的SLM成形合金存在力学性能各向异性.
Abstract
Ti-15Mo alloys were prepared by laser selective melting(SLM)technique in different building directions(0°,30°,45°,60°,90° form horizontal direction)and the anisotropy of microstructure and mechanical properties were studied.The results show that the texture orientation change was(001)→(101)→(111)when the building direction changed from 0° to 90°.The volume fraction of grain boundaries at low angles of 2°-10° in the alloys in 0° and 90° building directions was low.The average grain sizes of the alloys in the building directions of 0°,30°,45°,60° and 90° were 59.95,33.47,99.98,42.63,72.41 μm,respectively,and the average microhardnesses were 313.92,327.29,294.11,327.48,311.67 HV,respectively.The tensile strengths of the alloys in the building directions of 0°,45°,60°,90° were 866.35,898.78,1 055.97,913.70 MPa,and the yield strengths were 716.40,767.98,1 027.45,808.83 MPa,and the percentage elongations after fracture were 14.00％,18.97％,12.51％and 14.29％,respectively.The mechanical properties of SLM alloys in different building directions were anisotropic.
关键词
激光选区熔化/Ti-15Mo合金/各向异性/微观结构/力学性能Key words
selective laser melting/Ti-15Mo alloy/anisotropy/microstructure/mechanical property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据