On physical nature of creep acceleration effect in submicrocrystalline materials

被引:0
|
作者
I. V. Ratochka
机构
[1] Russian Academy of Sciences,Institute of Strength Physics and Materials Science of the Siberian Branch
关键词
Grain Size; Experimental Data; Feasible Solution; Theoretical Method; Physical Nature;
D O I
10.1007/s11182-005-0013-5
中图分类号
学科分类号
摘要
An analysis of special features of manifestation of the creep acceleration effect in polycrystalline metals and alloys in the presence of grain-boundary diffusion fluxes of an impurity from an external medium is made. It is noted that in certain cases where the diffusion properties of sub-boundary regions differ greatly from those within the boundary and in the bulk of the grain (e.g., in materials with submicrocrystalline structure (grain size 0.1–0.5 µm) and/or in the case of diffusion along the grain boundary of a strongly segregating impurity), conventional theoretical methods of calculation of the temperature-temporal range of the occurrence of the above effect have to be corrected. Based on the analysis of the experimental data, feasible solutions to the problem are discussed.
引用
收藏
页码:995 / 998
页数:3
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