Morphology and growth speed of hcp domains during shock-induced phase transition in iron.

Abstract:

: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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Pang WW,Zhang P,Zhang GC,Xu AG,Zhao XG

doi

10.1038/srep03628

subject

Has Abstract

pub_date

2014-01-10 00:00:00

pages

3628

issn

2045-2322

pii

srep03628

journal_volume

4

pub_type

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