脉冲激光处理等离子体冲击-空化原理的间接验证和理论应用  

Indirect confirmation and theoretical application of plasma shock−cavitation principle of pulsed laser shock

作　　者：卢国鑫 罗学昆 王强 刘纪德[3] 季忠 陆峰 孙晓峰[3] Guo-xin LU;Xue-kun LUO;Qiang WANG;Ji-de LIU;Zhong JI;Feng LU;Xiao-feng SUN(Key Laboratory for Liquid−Solid Structural Evolution and Processing of Materials,Ministry of Education,School of Materials Science and Engineering,Shandong University,Jinan250061,China;Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang110016,China)

机构地区：[1]山东大学材料科学与工程学院材料液固结构演变与加工教育部重点实验室,济南250061 [2]中国航发北京航空材料研究院航空材料先进腐蚀与防护航空科技重点实验室,北京100095 [3]中国科学院金属研究所师昌绪先进材料创新中心,沈阳110016

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第2期576-581,共6页中国有色金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52171073,51801031,51775117);the Foshan Science and Technology Innovation Project,China(No.2018IT100112);the Research Fund of Key Laboratory of High Performance Manufacturing for Aero Engine(Northwestern Polytechnical University),Ministry of Industry and Information Technology,China(No.HPM-2020-06);the Fund of the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University,China(No.SKLSP202014).

摘　　要：提出等离子体冲击-空化双物理效应耦合强化原理,在液体约束脉冲激光冲击中空化效应存在的合理性有待证实。选择XRD测试方法和较易获得衍射峰的304不锈钢,定量检测和表征单脉冲激光作用区域的残余应力分布。试验结果与文献分析表明,激光冲击强化的不同工艺条件导致等离子体冲击与空化两种应力效应的强度匹配不同,无涂层飞秒激光冲击应力效应的主要来源是空化效应。激光脉冲宽度以及吸收层和约束层等工艺参量的实际作用影响或决定脉冲激光表面处理的材料改性原理。The coupling strengthening principle of the double physical effect of plasma shock−cavitation was proposed,and the rationality of the cavitation effect in pulsed laser shock treatment under liquid−confined conditions needs to be confirmed urgently.The XRD testing method and 304 stainless steel,which is easy to obtain diffraction peaks,were selected to quantitatively detect and characterize the residual stress distribution in the action area of a single pulse laser beam.The test results and literature analysis show that the different process conditions of laser shock processing bring about different strength matching of the two stress effects of plasma shock and cavitation,and the main source of stress effect of femtosecond laser shock without coating is the cavitation effect.The actual effects of the laser pulse width and other process parameters such as the absorption layer and the constraint layer affect or determine the material modification principle of the pulsed laser surface treatment.

关 键 词：激光材料加工 等离子体冲击 空化 表面强化 

分 类 号：TG178[金属学及工艺—金属表面处理]