2015
DOI: 10.1007/s11012-015-0192-2
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On slip transmission and grain boundary yielding

Abstract: Dislocation-grain boundary interaction plays a key role in the plasticity of polycrystalline materials. Capturing the effect of discrete dislocations interacting with a grain boundary in continuum models is not yet achieved. To date several approaches exist, but they have shortcomings in capturing the influence of dislocation-dislocation interaction across a grain boundary and the parameters which control grain boundary yield are phenomenologically motivated. In this work we show that grain boundary yielding i… Show more

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Cited by 19 publications
(9 citation statements)
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“…This could be improved by consideration of all gradients ∇γ α , and the associated higher-order (back)stresses. In addition, the misorientation-dependent elastic interaction of dislocations across the GBs [4] is not considered in the GP model. Therefore, the presented GP results do not reflect the changes in the strain profiles caused by these interactions (Fig.…”
Section: Gradient Plasticity Simulations and Discussion Of Resultsmentioning
confidence: 99%
“…This could be improved by consideration of all gradients ∇γ α , and the associated higher-order (back)stresses. In addition, the misorientation-dependent elastic interaction of dislocations across the GBs [4] is not considered in the GP model. Therefore, the presented GP results do not reflect the changes in the strain profiles caused by these interactions (Fig.…”
Section: Gradient Plasticity Simulations and Discussion Of Resultsmentioning
confidence: 99%
“…The interaction of the grain boundary (GB) and mobile dislocations plays an important role in the plasticity of polycrystals. Such interactions depend on the crystallographic orientation of the neighboring grains at the GB and the stress concentration on the corresponding slip planes that accommodate the plastic slip [1]. A full description of slip transmission across GBs involves several parameters such as the misorientation of the neighboring grains, the Burgers vector and the glide planes of the dislocations, the global stress, and temperature [1].…”
Section: Introductionmentioning
confidence: 99%
“…Such interactions depend on the crystallographic orientation of the neighboring grains at the GB and the stress concentration on the corresponding slip planes that accommodate the plastic slip [1]. A full description of slip transmission across GBs involves several parameters such as the misorientation of the neighboring grains, the Burgers vector and the glide planes of the dislocations, the global stress, and temperature [1]. There are several studies that have analyzed the dislocation-GB interaction at a small scale using molecular dynamics, up to a large scale by applying continuum mechanic theories.…”
Section: Introductionmentioning
confidence: 99%
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