激光与光电子学进展, 2013, 50 (4): 041405, 网络出版: 2013-03-22
TC4钛合金激光冲击强化参数及性能分析 下载: 532次
Analysis on Laser Processing Parameters and Strengthening Effects of Laser Peening of TC4 Titanium Alloy
激光技术 激光冲击强化 显微硬度 钛合金 残余应力 laser technique laser peening micro-hardness titanium alloy residual stress
摘要
为了研究激光冲击强化对钛合金性能的影响,采用波长1064 nm、脉冲能量0~6 J、脉冲宽度6~14 ns的YAG脉冲激光器对TC4钛合金试样表面进行冲击强化处理,并对其表面的显微硬度和残余应力进行了试验测试与分析。结果表明,采用脉冲能量6 J、脉冲宽度12 ns、水约束层厚度1.8 mm的激光冲击强化参数,冲击区的表面显微硬度明显增加,比处理前提高约33.5%,冲击区表面存在的残余压应力数值高达-323 MPa。试验结果表明,激光冲击强化钛合金的效果明显。
Abstract
In order to study the effect of laser peening on the properties of titanium alloy, a TC4 titanium alloy sample is processed using YAG laser with the wavelength of 1064 nm, pulse energy of 0~6 J and pulse width of 6~14 ns, and its micro-hardness and residual stress are examined and analyzed. The experimental results show that the satisfying laser peening appearance can be achieved when the pulse energy is 6 J, pulse width is 12 ns and tamping layer thickness of water is 1.8 mm, the surface micro-hardness increases up to 33.5% and the compressive residual stress on the surface of laser shocked area reaches -323 MPa. Laser peening improves the hardness and residual stress of titanium alloy significantly. The experimental results show that the effect of laser peening evidently strengthens the titanium alloy.
乔红超, 赵吉宾, 于彦凤. TC4钛合金激光冲击强化参数及性能分析[J]. 激光与光电子学进展, 2013, 50(4): 041405. Qiao Hongchao, Zhao Jibin, Yu Yanfeng. Analysis on Laser Processing Parameters and Strengthening Effects of Laser Peening of TC4 Titanium Alloy[J]. Laser & Optoelectronics Progress, 2013, 50(4): 041405.