(1. 江苏大学 机械工程学院 光子制造科学与技术省重点实验室，
镇江 212013;
2. 华东理工大学 机械与动力工程学院, 上海 200237)
摘 要: 研究在Ti6Al4V合金激光冲击成形过程中， 不同激光参数对板料弯曲角及表层硬度的影响。 结果表明： 当激光功率密度小于3 GW/cm2时， 弯曲角随着激光功率密度线性增加， 激光功率密度超过3 GW/cm2时， 由于表面熔化现象的出现， 弯曲角出现减小的趋势； 板料弯曲角随冲击次数的增加也呈线性增长， 但弯曲阻力的增加使得弯曲角的增长速度逐渐减慢； 随着激光功率密度的增加， 材料表面冲击区的硬度增高， 表面硬化层的显微硬度最高达HV490， 硬化层厚度约为1.0 mm。
关键字: Ti6Al4V钛合金； 激光冲击成形； 工艺参数
（1. Jiangsu Provincial Key Laboratory of Science and Technology of Photon Manufacturing, School of Mechanical Engineering, Jiangsu University,
Zhenjiang 212013, China;
2. School of Mechanical and Power Engineering,
East China University of Science and Technology, Shanghai 200237, China）
Abstract: Laser shock processing technology was employed on Ti6Al4V and the influence of laser parameters on laser-shock forming of Ti-6Al-4V alloy was investigated. The results show that the bending angle is in proportion to the laser energy density and the number of laser shocking when the laser energy density is less than 3 GW/cm2, when the energy density is larger than 3 GW/cm2, the shocked surface of Ti-6Al-4V alloy will result in melting and a uniform hardened layer with almost 1.0 mm in thickness and HV490 in hardness is obtained on the surface of Ti6Al4V alloy when the technologic parameters are selected properly in laser shock processing.
Key words: Ti6Al4V alloy; laser shock forming; technique parameters
