Morphology and growth speed of hcp domains during shock-induced phase transition in iron.
Morphology and growth speed of hcp domains during shock-induced phase transition in iron.
复制标题
铁冲击诱导相变过程中 hcp 结构域的形态和生长速度
DOI:
10.1038/srep03628
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发表时间:
2014-01-10
影响因子:
4.6
通讯作者:
Zhao XG
中科院分区:
文献类型:
--
作者:
Pang WW;Zhang P;Zhang GC;Xu AG;Zhao XG
Emergence and time evolution of micro-structured new-phase domains play a crucial role in determining the macroscopic physical and mechanical behaviors of iron under shock compression. Here, we investigate, through molecular dynamics simulations and theoretical modelings, shock-induced phase transition process of iron from body-centered-cubic (bcc) to hexagonal-close-packed (hcp) structure. We present a central-moment method and a rolling-ball algorithm to calculate and analyze the morphology and growth speed of the hcp phase domains and then propose a phase transition model to clarify our derived growth law of the phase domains. We also demonstrate that the new-phase evolution process undergoes three distinguished stages with different time scales of the hcp phase fraction in the system.
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