激光冲击复合强化机理及在航空发动机部件上的应用研究  

The strengthening mechanism of laser shock processing and its application on the aero-engine components

作　　者：李应红[1] 何卫锋[1] 周留成[1] 

机构地区：[1]空军工程大学航空航天工程学院等离子动力学重点实验室,西安710038

出　　处：《中国科学：技术科学》2015年第1期1-8,共8页Scientia Sinica(Technologica)

基　　金：国家自然科学基金(批准号:51205406;51405507)资助项目

摘　　要：针对激光冲击强化在航空发动机高温部件、薄叶片和叶片榫槽/榫齿等复杂部件(位)应用的问题,系统开展了激光冲击表面纳米化方面的研究.本文在总结多种航空发动机金属材料激光冲击表面纳米化表征、原理、热稳定性研究的基础上,提出了基于表面纳米化和残余压应力的激光冲击复合强化机理,进而提高了激光冲击强化在高温部件上使用温度,并介绍了薄壁结构、榫槽/榫齿等特殊部件(位)激光冲击强化工程应用的情况.激光冲击表面纳米化及其复合强化机理的研究工作,拓宽了激光冲击强化的研究领域和应用范围.Aiming at the application problems of laser shock processing on the aero-engine high temperature components, thin blade, blademortises/tenon teeth and other complex parts（regions）, we carried out a systematical research on surface nanocrystallization induced by laser shock processing. This article summarized many studies about the characterization, theory and thermal stability of surface nanocrystallization of metal materials in various aero-engines. Moreover, we proposed a new strengthening mechanism of laser shock processing which was based on surface nanocrystallization and compressive residual stresses. Thereby, the application temperature of laser-peened high temperature components could be improved, and the engineering applications of laser shock processing on thin-wall construction, mortises/tenon teeth and other special parts（regions） were introduced. The research on laser-induced surface nanocrystallization and compound strengthening mechanism, which broadens the study area and application field of laser shock processing.

关 键 词：激光冲击强化 航空发动机 疲劳断裂 表面纳米化 复合强化机理 高温部件 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]