Crack Nucleation in Crystalline Solids
Crack Nucleation in Crystalline Solids
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DOI：
10.1179/msc.1967.1.1.56
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发表时间：
1967-01
期刊：
影响因子：
--
通讯作者：
E. Smith;J. Barnby
中科院分区：
文献类型：
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作者：
E. Smith;J. Barnby
裂纹可以通过几种不同的方式由不均匀的塑性流动形核。本文推导了适当的形核准则，并将其结果与以前的分析结果进行了比较，详细分析了其局限性。在某些情况下，形核比以前的理论认为的要容易得多；讨论了这一结论的后果，特别是关于脆性材料中解理裂纹的形成以及高温变形过程中晶界滑动形成裂纹的问题。
Cracks may be nucleated by inhomogeneous plastic flow in several different ways. This paper derives the appropriate nucleation criteria and compares the results with those obtained from earlier analyses, the limitations of which are examined in detail. In some circumstances nucleation occurs much more easily than previous theories suggest; the consequences of this conclusion are discussed, with particular reference to the formation of cleavage cracks in brittle materials and also to the formation of cracks by grain-boundary sliding during high-temperature deformation.