Finite element analysis on stresses field of normalized layer thickness within ceramic coating on aluminized steel

• Published in: Transactions of Nonferrous Metals Society of China Vol. 17; no. 5; pp. 934 - 939
• Main Author: 吴振强 夏原 李光 徐方涛
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2007; Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China
• Subjects: finite element method(FEM); interfacial stresses; multilayer coatings; normalized layer thickness; 多层涂料; 有限元方法; 标准厚度; 界面应力; normalized layer thickness; finite element method(FEM); interfacial stresses; multilayer coatings; interracial stresses
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(07)60203-9

Multilayer ceramic coatings were fabricated on steel substrate using a combined technique of hot dipping aluminum（HDA） and plasma electrolytic oxidation（PEO）. A triangle of normalized layer thickness was created for describing thickness ratios of HDA/PEO coatings. Then, the effect of thickness ratio on stresses field of HDA/PEO coatings subjected to uniform normal contact load was investigated by finite element method. Results show that the surface tensile stress is mainly affected by the thickness ratio of AI layer when the total thickness of coating is unchanged. With the increase of AI layer thickness, the surface tensile stress rises quickly. When Al2O3 layer thickness increases, surface tensile stress is diminished. ＇Meanwhile, the maximum shear stress moves rapidly towards internal part of HDA/PEO coatings. Shear stress at the Al2O3/Al interface is minimal when Al2O3 layer and AI layer have the same thickness.