Evolution of the dislocation structure and the formation of fatigue microcracks in pearlitic-ferritic steels

被引：0

作者：

V. I. Izotov

V. A. Pozdnyakov

E. V. Luk’yanenko

M. E. Getmanova

G. A. Philippov

机构：

[1] Bardin Research Institute for the Iron and Steel Industry (TsNIIChERMET),

[2] Moscow State Industrial University,undefined

来源：

The Physics of Metals and Metallography | 2008年 / 105卷

关键词：

62.20.Mk; 81.40.Np;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Theoretical and experimental study of the evolution of the dislocation structure in pearlite during fatigue tests using contact and bending modes of loading has been performed. Special features of the dislocation structure of pearlite with a different degree of the structure fineness upon cyclic loading have been analyzed. It has been shown that a size structural effect is realized in the pearlite, which manifests itself in the dependence of the arising dislocation structure in the ferrite interlayers on their thickness. The model of the initiation of a fatigue crack in pearlite has been developed and the period of its initiation under contact cyclic loading has been calculated. Microstructural changes upon the fatigue failure of a high-carbon pearlitic-ferritic steel with different degrees of pearlite fineness have been studied electron-microscopically during contact and bending cyclic deformation.

引用

页码：517 / 527

页数：10

共 23 条

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