| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Dislocation Dissociation Strongly Influences on Frank–Read Source Nucleation and Microplasticy of Materials with Low Stacking Fault Energy |
| HUANG Min-Sheng1,2**, ZHU Ya-Xin1,2, LI Zhen-Huan1,2 |
1Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074
2Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment, Wuhan 430074
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| Cite this article: |
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HUANG Min-Sheng, ZHU Ya-Xin, LI Zhen-Huan 2014 Chin. Phys. Lett. 31 046102 |
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Abstract The influence of dislocation dissociation on the evolution of Frank–Read (F-R) sources is studied using a three-dimensional discrete dislocation dynamics simulation (3D-DDD). The classical Orowan nucleation stress and recently proposed Benzerga nucleation time models for F-R sources are improved. This work shows that it is necessary to introduce the dislocation dissociation scheme into 3D-DDD simulation, especially for simulations on micro-plasticity of small sized materials with low stacking fault energy.
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Received: 14 November 2013
Published: 25 March 2014
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| PACS: |
61.72.Lk
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(Linear defects: dislocations, disclinations)
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62.20.fq
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(Plasticity and superplasticity)
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07.05.Tp
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(Computer modeling and simulation)
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