| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Characteristic Sizes for Exhaustion-Hardening Mechanism of Compressed Cu Single-Crystal Micropillars |
GAO Yuan, ZHUANG Zhuo, LIU Zhan-Li, ZHAO Xue-Chuan, ZHANG Zhao-Hui |
| Applied Mechanics Laboratory, School of Aerospace, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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GAO Yuan, ZHUANG Zhuo, LIU Zhan-Li et al 2010 Chin. Phys. Lett. 27 086103 |
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Abstract The stress-strain response of Cu single-crystal compression micropillar containing initial dislocation network is investigated by three-dimensional discrete dislocation dynamics simulations. The results demonstrate that the stress-strain curves can be divided into three distinct types with increasing the sizes of micropillars: the three-stage exhaustion hardening, the multi-stage mixed hardening and the two-stage conventional forest hardening. The characteristic sizes of the micropillars is determined for the second type of the curves to be 500-700 nm.
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| Keywords:
61.72.Lk
62.20.fq
81.40.Ef
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Received: 02 December 2009
Published: 28 July 2010
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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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81.40.Ef
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(Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)
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