• 首页 | 期刊简介 | 编委会 | 投稿须知 | 出版道德规范 | 下载专区 | English
曾宇春,朱奇,杨栋,杨子尧,朱建国*.热障涂层弹性模量和残余应力测试研究[J].实验力学,2020,35(2):234~242
热障涂层弹性模量和残余应力测试研究
Experimental measurement of elastic modulus and residual stress of thermal barrier coatings
投稿时间:2018-12-18  修订日期:2019-02-09
DOI:10.7520/1001-4888-18-272
中文关键词:  热障涂层  弹性模量  残余应力  数字图像相关方法
英文关键词:thermal barrier coating  elastic modulus  residual stress  digital image correlation
基金项目:国家自然科学基金(11672345, 11972014)
作者单位
曾宇春 江苏大学力学与工程科学系 镇江 212013 
朱奇 江苏大学力学与工程科学系 镇江 212013 
杨栋 江苏大学力学与工程科学系 镇江 212013 
杨子尧 江苏大学力学与工程科学系 镇江 212013 
朱建国* 江苏大学力学与工程科学系 镇江 212013 
摘要点击次数: 288
全文下载次数: 0
中文摘要:
      采用数字图像相关法实验研究了热喷涂制作的热障涂层的弹性模量和残余应力。首先,采用三点弯测试方法对热障涂层试件进行加载,并利用二维数字图像相关方法对热障涂层试件加装过程中的弯曲变形进行了精确的测量,进而获得了热障涂层在受拉和受压两种状态下的弹性模量,结果表明,受拉时热障涂层试件陶瓷层的弹性模量为31GPa,而受压时其弹性模量为34GPa。其次,基于内力平衡,推导了考虑曲率变化的涂层残余应力计算公式;利用三维数字图像相关法测量了喷涂前后基体曲率的变化,进而获得了涂层残余应力的大小,结果表明,热喷涂后的热障涂层残余应力为压应力,大小为-86~-70MPa。
英文摘要:
      The elastic modulus and residual stress of thermal-sprayed coating are experimentally measured by the digital image correlation method. Firstly, three-point bending testing method is used to measure the elastic mudulus of thermal barrier coating specimens. Meanwhile, the 2D digital image correlation method is employed to measure the bending deformation of the specimens. The elastic moduli of the coating in tension and compression stresses states are obtained. The results indicate that the elastic mudulus is 31 GPa when the ceramic layer is tensiled and 34 GPa when the ceramic layer is compressed, respectively. Secondly, a formula for calculating the residual stress of thermal barrier coating based on the internal force equilibrium and curvature change is deduced and the 3D digital image correlation method is used to obtain the curvature change of the substrate before and after thermal spraying. Then, the residual stress of the coating specimens is calculated. The results demonstrate that the residual stress of thermal-sprayed coating is compressive with magnitude of -86~-70MPa.
查看全文  查看/发表评论  下载PDF阅读器
关闭

版权所有:《实验力学》编辑部
您是本站第 5921134 位访问者,今日一共访问8238次,当前在线人数: 0
技术支持:本系统由北京勤云科技发展有限公司设计