激光冲击处理对小孔构件残余应力场的影响  

Effects of the residual stress field on hole components by laser shock processing

作　　者：钱绍祥[1,2] 殷晓中[1] 王琦[1] 刘波[1] 冷承业[1] 

机构地区：[1]镇江高等专科学校机械工程系,江苏镇江212003 [2]江苏大学机械工程学院,江苏镇江212013

出　　处：《镇江高专学报》2014年第4期61-63,共3页Journal of Zhenjiang College

基　　金：国家自然科学基金资助项目(51179076);江苏省普通高校研究生科研创新计划资助项目(CXLX13-640);镇江高专科研团队建设项目(ZJCKYTD05)

摘　　要：采用高功率Nd:glass激光器对LY12CZ铝合金小孔构件表面进行激光冲击强化处理,并对冲击区域进行残余应力场的测试与分析。结果显示,在激光功率密度为1.75 GW/cm2和光斑直径为6 mm的强激光冲击作用下,冲击区域产生了残余压应力场,层深约1.2 mm,表面最大残余应力为-57 MPa,厚度方向上最大残余应力为-36 MPa。优化后的激光冲击处理工艺参数能够获得较好的残余应力场。The surface of LY12CZ aluminum alloy hole component was treated with Nd：glasss laser,and its residu-al stress was tested and analyzed.In the impact of laser shock processing using the laser power density of 1.75 GW/cm2 and spot diameter of 6mm,the shocked area produced compressive residual stress with its deepness about 1.2mm.The maximum surface residual stress is -57MPa and the maximum residual stress in the thickness direc-tion is -36MPa.The optimization of LSP technological parameters can obtain good residual stress field.

关 键 词：激光冲击处理 小孔构件 LY12CZ 铝合金 残余应力 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]