Effect of Laser Peening on Residual Stress and Micro-hardness of TC4 Titanium Alloy

摘要：

　　Laser peening offers potential advantages over conventional peen technologies in terms of the depth of the residual stresses that can be induced,and improvements in surface micro-hardness.The present study was undertaken to understand the effect of laser penning on the properties of titanium alloy,a TC4 titanium alloy work-piece was processed with ND∶ YAG laser with the wavelength of 1064 nm,pulse energy of 0-10J and pulse width of 12ns,and micro-hardness and residual stress for different laser peening parameters were examined and analyzed by micro-hardness tester and X-ray diffraction.Results are presented and discussed of the residual stress profiles and the micro-hardness profiles,The experimental results show that the satisfying laser peening appearance can be achieved when the pulse energy was 6J,water tamping layer thickness was 1.8mm and ablative layer thickness was 100μm,surface micro-hardness increased by up to 33% and the compressive residual stress on the surface of laser shocked area reached up to-327.8MPa,laser peening improved hardness and residual stress of titanium alloy significantly.The experiment results show that the effect of laser peening was evidently.

关键词： laser peening micro-hardness residual stress titanium alloy surface treatment

作者: QIAO Hong Chao ZHAO Ji Bin ZHAO Yi Xiang LI Lun

作者单位: Shenyang institute of automation chinese academy of sciences,shenyang,liaoning,110016,china Institute of metal research chinese academy of sciences,shenyang,liaoning,110016,china

会议类型: 国际会议

会议名称: 2013 International Conference on Energy Research and Power Engineering(2013能源研究与电力工程国际会议)(ERPE2013)

会议地点: 郑州

会议语种:英文

页码: 972-976

在线出版日期: 2013-05-24（万方平台首次上网日期，不代表论文的发表时间）