中国光学2018，Vol.11Issue(2)：198-205,8.DOI:10.3788/CO.20181102.0198
激光冲击强化对激光增材TC4钛合金组织和抗氧化性的影响
Influence of laser shock peening on microstructure and oxidation resistance of laser additive manufactured TC4 titanium alloy
摘要
Abstract
In recent years,laser additive manufacturing(also called 3D printing) has become the focus of sci-entific research and industrial applications. In order to study the impact of laser shock peening(LSP) on the properties of laser additive manufactured Ti-6Al-4V alloy, a TC4 titanium alloy prepared by 3D printing was carried out LSP by using Nd:YAG laser with energy of 5 J,wavelength of 1 064 nm,pulse width of 10 ns and spot diameter of 3 mm,and the micro-hardness,microstructure,residual stress and high temperature oxidation performance of the material before and after LSP were analyzed. The results show that by comparing with the TC4 titanium alloy before LSP, the micro-hardness of that after LSP increases by 8%, and the depth of the impact layer reaches 0.4 mm, the grains in the strengthened region are refined, the dislocation is increased and the deformation twins are produced. The residual compressive stress of laser shock peening is as high as 472 MPa,and the high temperature oxidation resistance of the material is also improved.关键词
激光冲击强化/激光增材制造/钛合金/抗氧化性Key words
laser shock peening/laser additive manufacturing/titanium alloy/oxidation resistance分类
矿业与冶金引用本文复制引用
薛军,冯建涛,马长征,宋斌文,郭伟,彭鹏,孙汝剑,朱颖..激光冲击强化对激光增材TC4钛合金组织和抗氧化性的影响[J].中国光学,2018,11(2):198-205,8.基金项目
国家国际科技合作专项资助(No.2013DFR50590) （No.2013DFR50590）
民用飞机专项科研项目(No.MJ-2016-F-16)Supported by National International Collaborative Science and Technology Research Project(No.2013DFR50590) （No.MJ-2016-F-16）
Civil Air Craft Special Research Project(No.MJ-2016-F-16) （No.MJ-2016-F-16）
