钛合金表面等离子喷涂NiCrAl涂层残余应力检测及模拟研究  

Detection and Simulation Research of Residual Stresses in Plasma Sprayed NiCrAl Coatings on Titanium Alloy Substrate

作　　者：王贺权 张博 袁福河 张佳平 芦国强 WANG Hequan;ZHANG Bo;YUAN Fuhe;ZHANG Jiaping;LU Guoqiang(Department of Mechanical and Electronic Engineering,Shengyang Aerospace University,Shenyang 110136,China;AECC Shenyang Liming Aero-Engine Corporation Ltd.,Shenyang 110043,China)

机构地区：[1]沈阳航空航天大学机电工程学院,辽宁沈阳110136 [2]中国航发沈阳黎明航空发动机有限责任公司,辽宁沈阳110043

出　　处：《热加工工艺》2018年第22期147-151,共5页Hot Working Technology

基　　金：航空基金项目(2015ZF54031)

摘　　要：使用ASM2—3一X应力检测仪,利用盲孔法研究钛合金表面喷涂两种厚度NiCrAl涂层的残余应力分布情况。通过测量盲孔周围残余应力释放形成的应变得到平均主应力,并利用ANSYS有限元软件生死单元技术模拟仿真。实验与模拟结果表明:在一定厚度内,涂层残余应力为压应力,并随着厚度的增加而增大;同时残余应力的分布与试件的形状尺寸有关且在边缘附近位置有显著的应力集中现象。ASM2-3-X stress detector was used to study the distribution of the residual stresses in plasma sprayed NiCrAl coating with two different thicknesses on titanium alloy substrate by using blind hole method. The average principal stress was obtained by measuring the strain formed by residual stress releasing around the blind hole, and the life and death unit technology of ANSYS finite element software was used to simulate. The experimental and simulated results show that the residual stresses of the coatings are compressive stresses in a certain thickness, which increases with the increase of the thickness. The distribution of residual stress is related to the shape size of specimens and the phenomenon of the stress concentration is remarkable in the vicinity of the edge.

关 键 词：NICRAL涂层 残余应力 盲孔法 生死单元法 应力集中 

分 类 号：TG174[金属学及工艺—金属表面处理]