Modeling of Residual Stresses in FunctionallyGradient Al2O3 Coating on 316L Substrate
Al2O3 coating is normally prepared on the surface of 316L stainless steel as a very good tritium penetration barrier (TPB) to improve the penetration resistance of the substrate. The effects of compositional gradient and thickness of coating on the residual stresses within the Al2O3/316L graded coating in manufacturing process were analysed using finite element method. Modeling results showed that the residual stress distribution within a functionally graded coating could be adjusted by controlling the compositional gradient or selecting a proper gradient exponent of the coating. Also, the magnitude of residual stresses in the functionally graded coating was dependent on the coating thickness. Furthermore, to provide adequate comparison to the computational results, X-ray diffraction was used to assess the residual stresses at the different positions of Al2O3 coating. The measured residual stress was qualitatively in agreement with the numerical results obtained from FEA.
Functionally graded material (FGM) Residual stress Finite element analysis X-ray diffraction
LIU Hongbing TAO Jie ZHANG Pingze XU Jiang
College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics, Nanjing, China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）