Twinning and recrystallisation as crack tip deformation mechanisms during fracture

被引：33
作者：
Farkas, D [1 ]
机构：
[1] Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA
来源：
PHILOSOPHICAL MAGAZINE | 2005年 / 85卷 / 2-3期
关键词：
D O I：
10.1080/147864304123313157070
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report atomistic studies of the deformation mechanisms in the crack tip region during low temperature fracture of bcc Fe single crystals. The large-scale scale simulations use empirical potentials to study the crack tip response. The twins are formed by the emission of partial dislocations in adjacent slip planes of the {112} type. In addition to twinning, the results show the nucleation of new grains in the crack tip region. The twinning and stress-induced recrystallisation phenomena are also observed in fully three-dimensional digital samples of nanocrystalline Fe.
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页码：387 / 397
页数：11
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