K417材料激光冲击强化残余应力松弛预测  

Prediction of the Residual Stress Relaxation in K417 Material after Laser Shock Processing

作　　者：周留成[1] 陈东林[1] 汪诚[1] 王文兵[1] 

机构地区：[1]空军工程大学工程学院,西安710038

出　　处：《中国表面工程》2009年第4期57-60,65,共5页China Surface Engineering

基　　金：国防预研资金项目(513270103)

摘　　要：针对某型发动机涡轮叶片材料K417激光冲击强化后残余应力在高温下松弛的现象,分析了残余应力松弛的机理,并运用灰色理论建立了温度作用下残余应力松弛的灰色预测模型。该模型的计算结果和实验结果吻合良好,精度较高,为激光冲击强化后残余应力松弛的预测提供一种可行的方法。To explain the phenomenon of residual stress relaxation in high temperature in a certain aero-engine＇s turbine blade after Laser Shock Processing（LSP）, this paper analyzes the mechanism of residual stress relaxation. Then a model for the prediction of residual stress relaxation affected by temperature is established based on grey theory. The calculated results by means of the model are in good agreement with the experimental ones, which prove the feasibility of this method.

关 键 词：激光冲击强化 高温 残余应力松弛 灰色预测 

分 类 号：TG156[金属学及工艺—热处理]