A MODEL FOR THE OXIDE-GROWTH STRESS AND ITS EFFECT ON THE CREEP OF METALS

被引:54
作者
BERNSTEIN, HL
机构
[1] Department of Mechanical Engineering, University of Houston, Houston, 77004, TX
来源
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1987年 / 18卷 / 06期
关键词
D O I
10.1007/BF02668546
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A mathematical model is developed for the effect of the oxide growth stress upon the high temperature deformation of metal. The growth stress is modeled as a volumetric strain calculated from a modified Pilling-Bedworth ratio. The model is three-dimensional and allows the metal and the oxide scale to undergo both elastic and creep deformation during oxidation. The problems of oxidizing a flat plate, a solid rod, and a curved plate are formulated and solved. Experimental results for these geometries in the Ni-NiO system at 1000 °C are well predicted, both with and without an external load. The creep properties and the stress distribution in the NiO scale are calculated. © 1991 The Minerals, Metals and Materials Society, and ASM International.
引用
收藏
页码:975 / 986
页数:12
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