Crystal plasticity analysis of dislocation emission from micro voids

Slip deformation in the vicinity of a micro void in metal crystals is analyzed by a crystal plasticity technique, and the geometrically necessary dislocations, which accompany the gradient of plastic shear strain on slip systems, are evaluated. Aggregates of dislocation segments on pairs of slip sys...

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Bibliographic Details
Published in:International journal of plasticity 2005-11, Vol.21 (11), p.2071-2088
Main Author: Ohashi, Tetsuya
Format: Article
Language:English
Subjects:
Applied sciences
crystal plasticity
Crystals
Dislocation loops
Dislocations
Equivalence
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Inelasticity (thermoplasticity, viscoplasticity...)
Metals. Metallurgy
microstructures
Physics
Plasticity
Segments
Slip
Solid mechanics
Structural and continuum mechanics
Voids
voids and inclusions
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Summary:Slip deformation in the vicinity of a micro void in metal crystals is analyzed by a crystal plasticity technique, and the geometrically necessary dislocations, which accompany the gradient of plastic shear strain on slip systems, are evaluated. Aggregates of dislocation segments on pairs of slip systems that have the same slip directions but different slip planes exhibit a rhombus-shaped structure, and the structure is shown to be equivalent to prismatic dislocation loops of the interstitial type. Material transport and growth of voids are discussed in terms of GN dislocations.
ISSN:0749-6419
1879-2154
DOI:10.1016/j.ijplas.2005.03.018