Open AccessShock-induced phase transformations of iron studied with molecular dynamics
Author(s) -
Jian-Li Shao,
Pei Wang,
Qin Cheng-Sen,
Hongbo Zhou
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.5389
Subject(s) - shock wave , transformation (genetics) , phase (matter) , shock (circulatory) , hysteresis , mechanics , materials science , inverse , front (military) , physics , condensed matter physics , meteorology , quantum mechanics , chemistry , medicine , biochemistry , geometry , mathematics , gene
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.