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物理学报. 2007, 56(9): 5389-5393.
doi: 10.7498/aps.56.5389.
铁冲击相变的分子动力学研究
- 收稿日期: 2006-09-21
- 修回日期: 2007-02-01
- 刊出日期: 2007-09-20
English Abstract
Shock-induced phase transformations of iron studied with molecular dynamics
- Received Date:
21 September 2006
- Accepted Date:
01 February 2007
- Published Online:
20 September 2007
Abstract: Molecular dynamics simulations are used to investigate the shock-induced phase transformation of iron at a certain initial temperature, which shows that the temperature lowers the threshold pressure of shock-induced phase transformation. Also, the evolution of the loading and unloading waves is calculated and analyzed, and it is found that the velocity of the inverse phase transformation wave(during ε phase →α phase)equals the longitudinal sound speed of the wave front and is less than that of the wave rear. The pressure and density of unloading traces is also calculated, which affords a good explanation to the evolution of the unloading waves, and the phase transformation band of unloading is obtained, which shows the hysteresis in the reverse transformation.
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