ЭП866耐热马氏体不锈钢的激光冲击温强化特性  

Characteristic of Warm Laser Shock Peening of ЭП866 Heat Resistant Martensite Stainless Steel

作　　者：张青来[1] 何袁圆 张冰昕 ZHANG Qinglai;HE Yuanyuan;ZHANG Bingxin(School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;University of Michigan-Shanghai Jiao Tong University, Shanghai 200240, China)

机构地区：[1]江苏大学材料科学与工程学院,镇江212013 [2]上海交通大学密西根学院,上海200240

出　　处：《材料研究学报》2017年第11期827-832,共6页Chinese Journal of Materials Research

基　　金：国家自然科学基金(51175231)~~

摘　　要：使用钕玻璃脉冲激光器对航空发动机用耐热马氏体不锈钢进行ЭП866激光冲击温强化(WLSP)实验,使用X射线应力测定仪和透射电子显微镜分析了冲击表层的微观结构和性能。结果表明:与激光冲击强化(LSP)相比,WLSP有明显的温强化效应。动态应变时效(DSA)和动态析出(DP)结果表明:WLSP使不锈钢表层产生了更高幅值的残余压应力,析出了具有更高密度的位错结构和纳米级的析出相。The warm laser shock peening（WLSP） of heat resistant martensite stainless steel ЭП866 was carried out by Nd glass pulse laser, and the microstructure and properties of the impacted layer were assessed by transmission electron microscopy and X-ray stress analyzer. The results show that WLSP has obvious strengthening effect compared to LSP at room temperature. Through dynamic strain aging（DSA） and dynamic precipitation（DP）, the WLSP generates higher compressive residual stress,higher density dislocation structures and nano-scale precipitates on the impacted layer of the treated steel ЭП866.

关 键 词：金属材料 ЭП866不锈钢 激光冲击温强化 残余压应力 表面硬度 动态应变时效 

分 类 号：TN249[电子电信—物理电子学] TG142[一般工业技术—材料科学与工程]