中国物理B ›› 2016, Vol. 25 ›› Issue (12): 126201-126201.doi: 10.1088/1674-1056/25/12/126201
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
Strain-rate-induced bcc-to-hcp phase transformation of Fe nanowires
Hongxian Xie(谢红献), Tao Yu(于涛), Wei Fang(方伟), Fuxing Yin(殷福星), Dil Faraz Khan
- 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
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
摘要：
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.
中图分类号: (Nanowires)
- 62.23.Hj