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研究表明,腐蚀疲劳中力学—化学交互作用要涉及下述三种作用过程:1)介质传输;2)表面吸附与反应;3)固体扩散与脆化。其中进行最幔的过程起支配作用。由于腐蚀疲劳力学—化学交互作用过程十分复杂,影响因素很多,现在业已建立的模型,一般都是针对某一过程而提出的。本文从交互作用过程的角度,对腐蚀疲劳中的力学—化学模型进行分类与评述,给出各种模型的物理构思及数学描述,提出各种模型的适用范围及局限性,最后展望了腐蚀疲劳力学—化学模型的研究趋势。

Researches into the corrosion fatigue in last decade have shown that the following three steps should be involved in the mechanico-chemical interaction: 1)medium transportation,2)surfaee adsorption and reaction, 3)hydrogen diffusion in the solid inducing the embrittelment. Moreover, the slowest step is the rate governing process in the mechanico-chemical interaction. The process of the mechanico-chemieal interaction in corrosion fatigue is very complicated and can be influenced by many factors. Therefore, the models on the mechanico-chemical interaction developed up to now are generally restricted to bear the relationship with one or two steps. In the present paper, a review is made on the mechanico-chemieal models in corrosion fatigue developed in recent years from the view point of interaction process. The physical image and the mathematical descriptions of various models are analyzed, and spheres and limitations of application of these models on the mechanico-chemical interaetiort are pointed out. Finally, the research trends on the mechanico-chemical model in corrosion fatigue are outlined.