退火温度对激光选区熔化成形TA15钛合金微观组织与力学性能的影响

doi:10.13251/j.issn.0254-6051.2024.07.037

金属热处理 ›› 2024, Vol. 49 ›› Issue (7): 241-248.DOI: 10.13251/j.issn.0254-6051.2024.07.037

退火温度对激光选区熔化成形TA15钛合金微观组织与力学性能的影响

蒋军杰¹, 王永彪¹, 肖志玲¹, 樊江磊¹, 张正文²

1.郑州轻工业大学河南省机械装备智能制造重点实验室, 河南郑州 450002;
2.重庆大学金属增材制造(3D打印)重庆市重点实验室, 重庆 400044

收稿日期:2024-01-15 修回日期:2024-04-12 出版日期:2024-07-25 发布日期:2024-08-29
作者简介:蒋军杰(1990—),男,讲师,博士,主要研究方向为金属增材制造和结构优化设计,E-mail: violet5257@163.com
基金资助:
河南省科技攻关项目(222102230118,212102210113);河南省高等学校重点科研项目(23A460016)

Effect of annealing temperature on microstructure and mechanical properties of selective laser melted TA15 titanium alloy

Jiang Junjie¹, Wang Yongbiao¹, Xiao Zhiling¹, Fan Jianglei¹, Zhang Zhengwen²

1. Henan Key Laboratory of Intelligent Manufacturing of Mechanical Equipment, Zhengzhou University of Light Industry, Zhengzhou Henan 450002, China;
2. Chongqing Key Laboratory of Metal Additive Manufacturing (3D Printing), Chongqing University, Chongqing 400044, China

Received:2024-01-15 Revised:2024-04-12 Online:2024-07-25 Published:2024-08-29

摘要/Abstract

摘要： 研究了退火温度(650~900 ℃)对激光选区熔化成形TA15钛合金微观组织与力学性能的影响。结果表明,随着退火温度升高,SLM成形TA15钛合金中的细针状α′马氏体逐渐分解为α+β相,α相由细针状逐渐转变为层片状,β相主要在α′马氏体晶间以及内部晶格缺陷富集处析出。退火后试样晶粒取向差分布与SLM成形态试样非常类似,具有强烈的组织遗传性。在650~800 ℃退火温度区间内,随着退火温度升高,试样的强度和硬度下降,伸长率提高。当退火温度为900 ℃时,试样抗拉强度和伸长率分别为1117 MPa和11.2%,展现出最优的综合力学性能。

关键词: 激光选区熔化, TA15钛合金, 退火, 微观组织, 力学性能

Abstract: Effect of annealing temperature (650-900 ℃) on the microstructure and mechanical properties of TA15 titanium alloy prepared by laser selective melting (SLM) was studied. The results show that with the increase of annealing temperature, the acicular α′ martensite in the SLMed TA15 titanium alloy gradually decomposes into α+β phases, the α phase gradually transforms from acicular to lamellar, and the β phase is mainly precipitated in the α′ martensite intergranular and where rich in intragranular lattice defects. The grain misorientation distribution of the TA15 specimen after annealing is very similar to that of the as-SLMed specimen, which has strong microstructural inheritance. With the increase of annealing temperature in the range of 650-800 ℃, the strength and hardness of the specimen decrease, while the elongation increases. When the annealing temperature is 900 ℃, the tensile strength and elongation of the specimen are 1117 MPa and 11.2%, respectively, showing the best comprehensive mechanical properties.

Key words: selective laser melting, TA15 titanium alloy, annealing, microstructure, mechanical properties

中图分类号:

蒋军杰, 王永彪, 肖志玲, 樊江磊, 张正文. 退火温度对激光选区熔化成形TA15钛合金微观组织与力学性能的影响[J]. 金属热处理, 2024, 49(7): 241-248.

Jiang Junjie, Wang Yongbiao, Xiao Zhiling, Fan Jianglei, Zhang Zhengwen. Effect of annealing temperature on microstructure and mechanical properties of selective laser melted TA15 titanium alloy[J]. Heat Treatment of Metals, 2024, 49(7): 241-248.

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退火温度对激光选区熔化成形TA15钛合金微观组织与力学性能的影响

Effect of annealing temperature on microstructure and mechanical properties of selective laser melted TA15 titanium alloy

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