Production and migration of interstitials in deformed metals

Shropshire, Steven L.; Collins, Gary S.

doi:10.1007/bf02399841

Cited by 3 publications

(1 citation statement)

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“…It is still possible that interstitial ions or clusters of interstitials are produced but are removed by mobile dislocations or annihilated with vacancy complexes shortly after they are born and therefore are undetectable by standard techniques. 57,58 Recent molecular dynamics (MD) studies suggest that small sizes of stable interstitial loops are produced during deformation of Al, and that they contribute to the strengthening. 59 However, MD simulations suffer from various shortcomings related to inaccuracies of atomic potentials, time scale discrepancies, fine size of the models, boundary conditions and issues related to proper identification of defects in a highly distorted atomic structure.…”

Section: Intermittent Flow Of Dislocations Production Of Point Defect...mentioning

confidence: 99%

Intermittent plastic flow of single crystals: central problems in plasticity: A review

Niewczas

2014

Materials Science and Technology

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The relationships between microstructure and plastic flow properties of copper single crystals deformed at low temperatures are reviewed based on the analysis of experimental results of mechanical, structural and electrical resistivity characterisation. Electrical resistivity measurements suggest that the flow stress correlates with the average density of defects accumulated in the microstructure. The characteristic microstructural length scale that determines the flow stress corresponds closely to the size of dislocation free channels and/or cells produced during plastic flow. The correspondence between micro- and macroscopic approaches to the plastic flow has been analysed based on the behaviour of dislocation mean free path and mean slip distance and their relationship to the microstructure. Production and annihilation of nanoscale debris and point defects and their role in plastic flow and questions pertinent to the influence of microstructural instabilities on the flow stress, workhardening, storage and annihilation of lattice defects have been discussed.

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Section: Intermittent Flow Of Dislocations Production Of Point Defect...mentioning

confidence: 99%