Microstructure and Mechanical Properties of Heat Treatment TA15/ TC17 Titanium Alloy by Laser Deposition Repair

被引：0

作者：

Bian H. ^{[1
]}

Zuo S. ^{[1
]}

Qu S. ^{[2
]}

Yang G. ^{[1
]}

Wang W. ^{[1
]}

机构：

[1] Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang

[2] Welding Research Institute, Shenyang Liming Aero-Engine Corporation LTD, AECC, Shenyang

来源：

Xiyou Jinshu/Chinese Journal of Rare Metals | 2020年 / 44卷 / 05期

关键词：

Heat treatment; Laser deposition repair; Microstructure; TA15; TC17; Tensile property;

D O I：

10.13373/j.cnki.cjrm.XY18100016

中图分类号：

学科分类号：

摘要：

The effect of annealing temperature on microstructure and mechanical properties of TA15/TC17 titanium alloy by laser deposition repair was studied. After annealing treatment, the length, width and length-width ratio of α lamellar have not change obviously in the two-state structure of TC17; the as-deposited samples structure the TA15 repair zone was a coarse β columnar crystal with a α/β basket structure in the grain; when the annealing temperature rose from 610℃ to 650℃, the α lamellar width of the TA15 repair region increased obviously, the volume fraction gradually decreased, and the aspect ratio decreased, showing a short rod-like distribution. The tensile strength and plasticity of the repaired specimens increased obviously after annealing heat treatment, when the annealing temperature was 650℃, the tensile strength was 1102 MPa, increased by 7.1% compared with as-deposited samples, which reached over 98.4% of the wrought standard of TC17. The elongation after fracture was 13.5%, which was obviously higher than the wrought standard of TC17 and TA15, and the change of annealing temperature had little effect on microhardness. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.

引用

页码：455 / 461

页数：6

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