2005
DOI: 10.4028/www.scientific.net/msf.482.17
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A Model for Crack-Induced Nucleation of Dislocations, Complex Stacking Faults and Twins

Abstract: This paper addresses a class of deformation mechanisms involving the coordinated shear of multiple, parallel slip planes. Relevant phenomena include complex stacking faults, deformation twins, and dislocation nucleation ahead of cracks in metals. As part of the theory, we revisit the notion of a multi-plane slip potential, we develop a criterion for the emergence of microtwins, and we discern the conditions that favor microtwin versus dislocation nucleation. The model is constructed using concepts from the con… Show more

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Cited by 5 publications
(2 citation statements)
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“…Modeling deformation twinning in bcc crystals also necessitates a realistic and robust constitutive response for coordinated 111 {112} slip and n-layer stacking faults, somewhat analogous to the generalized stacking fault energy for the case of single-plane slip. From the energy potential one may obtain the displacements and interplanar shear stresses for the active number of interacting slip planes by numerical analysis [68], the first stable multi-layer stacking fault to occur on {112} planes, and the morphology of twinning interface (i.e., reflection or isosceles).…”
Section: Local Environment Effectmentioning
confidence: 99%
See 1 more Smart Citation
“…Modeling deformation twinning in bcc crystals also necessitates a realistic and robust constitutive response for coordinated 111 {112} slip and n-layer stacking faults, somewhat analogous to the generalized stacking fault energy for the case of single-plane slip. From the energy potential one may obtain the displacements and interplanar shear stresses for the active number of interacting slip planes by numerical analysis [68], the first stable multi-layer stacking fault to occur on {112} planes, and the morphology of twinning interface (i.e., reflection or isosceles).…”
Section: Local Environment Effectmentioning
confidence: 99%
“…In contrast to often modelled single dislocation emission, multi-plane slip models for complex deformation features are scarce. Notably, Beltz et al [68] developed a multi-plane continuum model to handling nonlinear effects associated with extended dislocation cores and micro-twin formation in bcc crystals. The theory originally constructed for mode II loading uses concepts from the Peierls-Nabarro framework, but unfortunately is not straightforwardly applicable to our case.…”
Section: Local Environment Effectmentioning
confidence: 99%