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Strain-rate-induced bcc-to-hcp phase transformation of Fe nanowires |
| Hongxian Xie(谢红献)1,2,3,4, Tao Yu(于涛)2, Wei Fang(方伟)3,4, Fuxing Yin(殷福星)3,4, Dil Faraz Khan5 |
1. School of Mechanical Engineering, Hebei University of Technology, Tianjin 300132, China;
2. Central Iron and Steel Research Institute, Beijing 100081, China;
3. Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Tianjin 300132, China;
4. Research Institute for Energy Equipment Materials, Hebei University of Technology, Tianjin 300132, China;
5. Department of Physics, University of Science and Technology Bannu, Bannu 28100, Pakistan |
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Abstract Using molecular dynamics simulation method, the plastic deformation mechanism of Fe nanowires is studied by applying uniaxial tension along the[110] direction. The simulation result shows that the bcc-to-hcp martensitic phase transformation mechanism controls the plastic deformation of the nanowires at high strain rate or low temperature; however, the plastic deformation mechanism will transform into a dislocation nucleation mechanism at low strain rate and higher temperature. Furthermore, the underlying cause of why the bcc-to-hcp martensitic phase transition mechanism is related to high strain rate and low temperature is also carefully studied. Based on the present study, a strain rate-temperature plastic deformation map for Fe nanowires has been proposed.
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Received: 01 March 2016
Revised: 24 August 2016
Accepted manuscript online:
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PACS:
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62.23.Hj
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(Nanowires)
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71.15.Pd
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(Molecular dynamics calculations (Car-Parrinello) and other numerical simulations)
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64.70.K-
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51571082) and China Postdoctoral Science Foundation (Grant No. 2015M580191). |
Corresponding Authors:
Hongxian Xie
E-mail: hongxianxie@163.com
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Cite this article:
Hongxian Xie(谢红献), Tao Yu(于涛), Wei Fang(方伟), Fuxing Yin(殷福星), Dil Faraz Khan Strain-rate-induced bcc-to-hcp phase transformation of Fe nanowires 2016 Chin. Phys. B 25 126201
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