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Chinese Journal of High Pressure Physics  > 2009  >  23(2): 117-122 .
LI Qing-Zhong, CHEN Yong-Tao, TANG Tie-Gang. Loading and Unloading Process, Phase Transition, and Spallation in FeMnNi Alloy under High Shock-Compression[J]. Chinese Journal of High Pressure Physics, 2009, 23(2): 117-122 . doi: 10.11858/gywlxb.2009.02.007
Citation: LI Qing-Zhong, CHEN Yong-Tao, TANG Tie-Gang. Loading and Unloading Process, Phase Transition, and Spallation in FeMnNi Alloy under High Shock-Compression[J]. Chinese Journal of High Pressure Physics, 2009, 23(2): 117-122 . doi: 10.11858/gywlxb.2009.02.007
shu

Loading and Unloading Process, Phase Transition, and Spallation in FeMnNi Alloy under High Shock-Compression

doi: 10.11858/gywlxb.2009.02.007

  • National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China

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  • Corresponding author: LI Qing-Zhong
  • Received Date: 17 Jul 2008
  • Rev Recd Date: 17 Nov 2008
  • Publish Date: 15 Apr 2009
    Abstract
  • Using VISAR interferometer and X-ray, phase transition and spalling behavior of FeMnNi alloy under high pressure were studied by symmetric impact and reverse impact experiments. In the loading process, the FeMnNi alloy experienced a phase transformation, the velocity of the transition was greater than that of the plastic wave, and thus incorporated into a single phase transition wave. In the unloading history, the reverse phase transition also might take place and the rarefaction waves S1 and S2 formed besides the center-rarefaction wave R. The multi-spallation happened for symmetrical and same thickness high pressure in FeMnNi alloy. By analyzing the interaction among the rarefaction waves S1, S2 and the rarefaction R, it was found that the phase transition and reverse transition of the sample are the main causes of multi-spallation.

     

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