CLAM钢基体表面Al2O3功能梯度涂层残余应力模拟分析  

Simulation and analysis of the residual stresses in functionally graded Al_2O_3 coatings on CLAM steel

作　　者：严资林[1,2] 黄群英[1,2] 宋勇[1,2] 郭智慧[1,2] 吴宜灿[1,2] 

机构地区：[1]中国科学院等离子体物理研究所,安徽合肥230031 [2]中国科技大学核科学技术学院,安徽合肥230027

出　　处：《核科学与工程》2008年第4期289-294,共6页Nuclear Science and Engineering

基　　金：国家自然科学基金项目(10775135、50871108和10675123)

摘　　要：在ITER中国液态锂铅测试包层模块设计中拟采用Al2O3作为防氚渗透耐蚀绝缘涂层,为了防止涂层与CLAM钢基体间由于材料热膨胀不匹配而开裂失效,采用热应力缓和型功能梯度涂层。利用有限元分析软件ANSYS研究了Al2O3/CLAM钢系功能梯度涂层的残余应力分布。模拟结果表明,当成分分布指数p=0.8、层数N=6、梯度层厚度为H=0.6 mm时,应力缓和效果最优。此分析结果可为该涂层制备工艺的优化提供理论指导。Alumina coatings on CLAM steel substrate are proposed to serve as tritium, corrosion and electric insulation barriers in the design of Dual Functional Lithium Lead Test Blanket Module （DFLL-TBM） in China in the frame of ITER. In order to avoid the crack failure due to thermal expansion mismatch of the coating and the substrate, the functionally graded materials （FGM） concept was adopted. In this paper, the residual thermal stresses in the coatings were calculated with the commercial software ANSYS. It is recommended that the compositional factor, numbers of the gradient interlayers and the thickness of the FGM zone are p=0.8, N=8, H=0.6 mm, respectively, according to the simulation results. These results could be helpful and theoretical guidance to the preparation and optimization of the coatings in the future.

关 键 词：测试包层模块 功能梯度涂层 残余应力 数值模拟 

分 类 号：TF627[冶金工程—钢铁冶金]