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退火方式对激光沉积TA15钛合金组织及力学性能的影响

Effect of Annealing Method on Microstructure and Mechanical Propertiesof TA15 Titanium Alloys by Laser Deposition Manufacturing

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摘要

以TA15球形粉末为原料,利用激光沉积制造方法制备了TA15钛合金厚壁件,研究了单重退火和双重退火对TA15钛合金显微组织和室温拉伸性能及各向异性的影响。结果表明,两种退火方式下α相的组织形貌存在明显差异,室温拉伸性能受到β柱状晶晶界影响,呈现出高强度低塑性的特征,沉积方向上的组织变形较大;双重退火对强度及塑性的各向异性具有改善作用;随退火温度的升高,单重退火下的显微硬度变化不明显,而双重退火下的显微硬度略微增大。

Abstract

By using TA15 spherical powder as the raw material, the bulk specimens of TA15 titanium alloy are formed by laser deposition manufacturing. The effects of single-annealing and duplex-annealing on microstructures, tensile properties at room temperature, and anisotropy of TA15 titanium alloys are studied. The results show that, there exist significant differences in the α-phase morphologies under the two annealing methods, tensile properties at room temperature are characterized by high strength and low plasticity due to the influence of β columnar grain boundary, and the deformation in the deposition direction is relatively large. The duplex-annealing can make obvious improvements on the strength and plastic anisotropy. The micro hardness under single-annealing is hardly influenced by the increase of annealing temperature, in contrast, that under duplex-annealing increases slightly.

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中图分类号:TG146.2+3

DOI:10.3788/cjl201845.0302004

所属栏目:激光制造

基金项目:国家重点研发计划(2016YFB1100504)、国家自然科学基金(51505301,51375316)、辽宁省自然科学基金(2015020118)

收稿日期:2017-08-07

修改稿日期:2017-09-19

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作者单位    点击查看

钦兰云:沈阳航空航天大学航空制造工艺数字化国防重点学科实验室, 辽宁 沈阳 110136
徐丽丽:沈阳航空航天大学航空制造工艺数字化国防重点学科实验室, 辽宁 沈阳 110136
杨光:沈阳航空航天大学航空制造工艺数字化国防重点学科实验室, 辽宁 沈阳 110136
王文东:沈阳飞机工业(集团)有限公司, 辽宁 沈阳 110034
倪家强:沈阳飞机工业(集团)有限公司, 辽宁 沈阳 110034
尚纯:沈阳航空航天大学航空制造工艺数字化国防重点学科实验室, 辽宁 沈阳 110136

联系人作者:杨光(yangguang@sau.edu.cn)

备注:钦兰云(1977—),女,博士,副教授,主要从事激光沉积制造和修复技术方面的研究。E-mail: qinly@sau.edu.cn

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引用该论文

Qin Lanyun,Xu Lili,Yang Guang,Wang Wendong,Ni Jiaqiang,Shang Chun. Effect of Annealing Method on Microstructure and Mechanical Propertiesof TA15 Titanium Alloys by Laser Deposition Manufacturing[J]. Chinese Journal of Lasers, 2018, 45(3): 0302004

钦兰云,徐丽丽,杨光,王文东,倪家强,尚纯. 退火方式对激光沉积TA15钛合金组织及力学性能的影响[J]. 中国激光, 2018, 45(3): 0302004

被引情况

【1】严振宇,周庆军,侯谊飞,杨光伟,马存强,王福德. 层间停留时间对激光熔化沉积TC11钛合金组织与力学性能的影响. 中国激光, 2018, 45(11): 1102003--1

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