The contribution of grain boundary sliding to axial strain during diffusion creep
The contribution of grain boundary sliding to axial strain during diffusion creep
复制标题
扩散蠕变过程中晶界滑动对轴向应变的贡献
DOI：
10.1080/14786437208223868
复制
发表时间：
1972
影响因子：
1.6
通讯作者：
W. Cannon
中科院分区：
文献类型：
--
作者：
W. Cannon
摘要 在扩散蠕变过程中，为了保持晶界的连续性，晶界滑动是必要的。本文通过使用二维六边形阵列表明，正如 R. N. Stevens (1971) 所预测的那样，晶界滑动将为样品贡献额外的轴向应变。然而，研究表明，这种类型的滑动与“普通”晶界滑动的宏观效应之间存在差异，前者称为 Lifshitz 晶界滑动，不会增加沿样品长度的晶粒数量，而后者则称为 Rachinger 晶界滑动。仅考虑扩散蠕变，得出的结论是，其中egb（L）是由于Lifshitz晶界滑动引起的应变，ed是如果仅发生应力定向扩散而没有必要的晶界滑动（在这种情况下会发生晶界分离）的情况下多晶聚集体将经历的应变，egb是晶粒应变等...
Abstract Grain boundary sliding is necessary during diffusion creep to maintain continuity across the grain boundaries. In this paper it is shown, by use of a two-dimensional hexagonal array, that grain boundary sliding will contribute additional axial strain to the specimen as predicted by R. N. Stevens (1971). It is shown, however, that there is a difference between the macroscopic effect of this type of sliding and that of ‘ordinary’ grain boundary sliding, in that the former, named Lifshitz grain boundary sliding, does not increase the number of grains along the length of the specimen, whereas, the latter, named Rachinger grain boundary sliding, does. Considering only diffusion creep, it is concluded that where egb(L) is the strain due to Lifshitz grain boundary sliding, ed is the strain a polycrystalline aggregate would experience if only stress-directed diffusion were to occur without the necessary grain boundary sliding in which case grain boundary separation would occur, egb is the grain strain et...