CAJ | 학술논문

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。
채용고공솔 Nd：glass 격광기대 LY12CZ 려합금소공구건표면진행격광충격강화처리，병대충격구역진행잔여응력장적측시여분석。결과현시，재격광공솔밀도위1．75 GW/cm2화광반직경위6 mm 적강격광충격작용하，충격구역산생료잔여압응력장，층심약1．2 mm，표면최대잔여응력위-57 MPa，후도방향상최대잔여응력위-36 MPa。우화후적격광충격처리공예삼수능구획득교호적잔여응력장。
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.