高压物理学报2011，Vol.25Issue(2)：153-158,6.
FeMnNi合金冲击相变与卸载逆相变历程研究
Phase Transition and Reverse Transition in FeMnNi Alloy
摘要
Abstract
By means of VISAR,the phase transition and reverse phase transition in FeMnNi alloy under different pressures were studied through direct impact and reverse impact experiments. As the difference between shock pressure and phase transition threshold is larger than reverse transition threshold,namely O＜ap—at＜σn ,it may lead to an occurrence of the a→e phase transition in FeMnNi alloy, and produces a multi-wave structure consisting of an elastic wave, a plastic wave and a phase transition wave. Under the release process, the rarefaction wave reflecting by the plastic wave from the free surface induces the complete reverse phase transition ε→a, and forms a multi-wave structure comprising a rarefaction wave, a rarefaction shock wave and another rarefaction wave. As σp—σt＞σn,it may produce a multi-wave structure with phase interface reflection (PIR) wave. During the release process,the rarefaction wave reflecting by the residual phase wave causes the reverse phase transition ε→a,and forms a two-wave structure consisting of a rarefaction wave and a rarefaction shock wave.关键词
固体力学/FeMnNi/相变/逆相变Key words
solid mechanics / FeMnNi alloy/ phase transition/ reverse phase transition分类
数理科学引用本文复制引用
陈永涛,李庆忠,唐小军,刘文韬..FeMnNi合金冲击相变与卸载逆相变历程研究[J].高压物理学报,2011,25(2):153-158,6.基金项目
国家自然科学基金(10902102) （10902102）
中国工程物理研究院科学技术基金(2009B0201014) （2009B0201014）
