中国物理B ›› 2010, Vol. 19 ›› Issue (5): 56402-056402.doi: 10.1088/1674-1056/19/5/056402

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Shock-induced phase transition and spalling characteristic in pure iron and FeMnNi alloy

陈永涛, 唐小军, 李庆忠   

  1. Laboratory for Shock Wave and Detonation Physical Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China
  • 收稿日期:2009-10-19 修回日期:2009-11-25 出版日期:2010-05-15 发布日期:2010-05-15
  • 基金资助:
    Project supported by the National Science Foundations of China (Grant Nos.~10776032 and 10902102) and \par Science Foundation of China Academy of Engineering Physics (Grant Nos.~20060104 and 2009B0201014).

Shock-induced phase transition and spalling characteristic in pure iron and FeMnNi alloy

Chen Yong-Tao(陈永涛), Tang Xiao-Jun(唐小军), and Li Qing-Zhong(李庆忠)   

  1. Laboratory for Shock Wave and Detonation Physical Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China
  • Received:2009-10-19 Revised:2009-11-25 Online:2010-05-15 Published:2010-05-15
  • Supported by:
    Project supported by the National Science Foundations of China (Grant Nos.~10776032 and 10902102) and \par Science Foundation of China Academy of Engineering Physics (Grant Nos.~20060104 and 2009B0201014).

摘要: This paper provides an investigation of the phase transition and spalling characteristic induced during shock loading and unloading in the pure iron and the FeMnNi alloy. The impact for the pure iron is symmetric and with same-thickness for both the flyer and the target plate. It is found that an abnormal multiple spalling happens in the pure iron sample as the pressure exceeds the $\alpha -\varepsilon $ transition threshold of 13 GPa. In the symmetric and same-thickness impact and reverse impact experiments of the FeMnNi alloy, two abnormal tension regions occur when the pressure exceeds the $\alpha -\varepsilon $ transition threshold of 6.3~GPa, and the reverse phase transition $\varepsilon -\alpha $ begins below 4.2~GP. The experimental process is simulated successfully from the non-equilibrium mixture phase and Boettger's model. Such abnormal spalling phenomena are believed to relate to the shocked $\alpha -\varepsilon $ phase transition. The possible reasons for the abnormal multiple spalling, which occurs during the symmetric and same-thickness impact experiments of pure iron and FeMnNi alloy, are discussed.

Abstract: This paper provides an investigation of the phase transition and spalling characteristic induced during shock loading and unloading in the pure iron and the FeMnNi alloy. The impact for the pure iron is symmetric and with same-thickness for both the flyer and the target plate. It is found that an abnormal multiple spalling happens in the pure iron sample as the pressure exceeds the $\alpha -\varepsilon $ transition threshold of 13 GPa. In the symmetric and same-thickness impact and reverse impact experiments of the FeMnNi alloy, two abnormal tension regions occur when the pressure exceeds the $\alpha -\varepsilon $ transition threshold of 6.3 GPa, and the reverse phase transition $\varepsilon -\alpha $ begins below 4.2 GP. The experimental process is simulated successfully from the non-equilibrium mixture phase and Boettger's model. Such abnormal spalling phenomena are believed to relate to the shocked $\alpha -\varepsilon $ phase transition. The possible reasons for the abnormal multiple spalling, which occurs during the symmetric and same-thickness impact experiments of pure iron and FeMnNi alloy, are discussed.

Key words: pure iron, FeMnNi alloy, phase transition, spalling behaviour

中图分类号: 

  • 64.70.K-
62.50.-p (High-pressure effects in solids and liquids) 62.30.+d (Mechanical and elastic waves; vibrations) 62.20.M- (Structural failure of materials)