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The core structure ...
The core structure of screw dislocations with [001] Burgers vector inMg(2)SiO(4) olivine
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- Mahendran, Srinivasan, 1989 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Carrez, Philippe (author)
- Université de Lille,University of Lille
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- Cordier, Patrick (author)
- Université de Lille,University of Lille,Institut Universitaire de France
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(creator_code:org_t)
- 2021-12-16
- 2021
- English.
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In: Comptes Rendus Physique. - : Cellule MathDoc/CEDRAM. - 1878-1535 .- 1631-0705. ; 22, s. 7-18
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Abstract
Subject headings
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- In this study, we report atomistic calculations of the core structure of screw dislocations with [001] Burgers vector in Mg2SiO4 olivine. Computations based on the THB1 empirical potential set for olivine show that the stable core configurations of the screw dislocations correspond to a dissociation in {110} planes involving collinear partial dislocations. As a consequence, glide appears to be favorable in {110} planes at low temperature. This study also highlights the difference between dislocation glide mechanism in {110} versus (010) or (100) for which glide is expected to occur through a locking-unlocking mechanism.
Subject headings
- NATURVETENSKAP -- Kemi -- Teoretisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Dislocation glide
- Core structure
- Crystal plasticity
- Atomistic simulations
- Olivine
Publication and Content Type
- art (subject category)
- ref (subject category)
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