TC21钛合金回转体部件激光冲击强化残余应力数值模拟研究  

Numerical Simulation of Laser Shock Peening Induced Residual Stress on TC21 Titanium Alloy Manufactured Cylinder Component

作　　者：刘仁志 孙汝剑 张永鑫 崔向中 曹子文 郭伟[3] 陈凯[3] LIU Renzhi;SUN Rujian;ZHANG Yongxin;CUI Xiangzhong;CAO Ziwen;GUO Wei;CHEN Kai(Shenyang Representative Bureau,Naval Armament Department,Shenyang 110034,China;Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering,AVIC Manufacturing Institute,Beijing 100024,China;Beihang University,Beijing 100191,China)

机构地区：[1]海装沈阳局驻某地区第一军代表室,沈阳110034 [2]中国航空制造技术研究院先进表面工程技术航空科技重点实验室,北京100024 [3]北京航空航天大学,北京100191

出　　处：《航空制造技术》2024年第18期73-81,共9页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(52101103)。

摘　　要：针对某型飞机机身用TC21钛合金回转体部件激光冲击强化残余应力分布问题,采用有限元数值模拟方法系统研究了搭接率、激光能量、冲击次数对其径向、周向及轴向残余应力分布的影响。研究结果表明,激光冲击强化对残余径向应力几乎无影响,仅对周向和轴向残余应力影响明显。低搭接率激光冲击下回转体芯部存在明显的应力集中,但会随着搭接率的增加而改善。激光冲击在回转体内部诱导的残余应力层深度对激光能量和搭接率不敏感,仅在提高冲击次数时出现一定的增加。TC21钛合金回转体部件最佳激光冲击强化工艺应选用50%搭接率和2次冲击,但激光能量需要根据部件的实际服役应力情况而定。In this study,laser shock peening(LSP)induced residual stress distributions on the aircraft fuselage used TC21 titanium alloy cylinder components were investigated.The effects of overlapping rate,laser energy,and impact times on the radial,circumferential and axial residual stress distributions were systematically studied.Results show that LSP has negligible influence on the distribution of radial stress,but significant influence on the distribution of circumferential and axial stress.Obvious stress concentration in the core of the cylinder components is observed,which is further eased by increasing the overlapping rate.The depth of residual stress layer induced by LSP in the cylinder components is not sensitive to laser energy or overlapping rate,which only exhibits a slight increase in the case of increasing the impact times.The optimized LSP parameters for TC21 titanium alloy cylinder components are of an overlapping rate of 50%and an impact times of two.The laser energy should be determined according to the actual service stress of the components.

关 键 词：激光冲击强化(LSP) 残余应力 数值模拟 TC21钛合金 回转体部件 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TG146.23[一般工业技术—材料科学与工程] V261[金属学及工艺—金属材料]