FeMnNi合金的冲击相变和层裂特性的实验研究  

Experimental study on characteristics of shock-induced phase transition and spallation in FeMnNi alloy

作　　者：张兴华[1] 唐志平[1] 徐薇薇[1] 唐小军[2] 郑航[1] 

机构地区：[1]中国科学技术大学中科院材料力学行为和设计重点实验室,安徽合肥230027 [2]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,四川绵阳621900

出　　处：《爆炸与冲击》2007年第2期103-108,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10176029)

摘　　要：对FeMnNi合金进行了轻气炮平板撞击实验研究,实验中材料发生了相变和层裂。得到的FeMn-Ni合金的相变阈值压力为6.3-6.9 GPa,远低于纯铁的相变阈值压力13 GPa,说明Mn、Ni合金元素的加入会极大的降低相变阈值。回收试样观测表明,当应力高于FeMnNi合金的相变阈值时,样品中可能产生二次层裂现象和浅表层裂新现象。实验结果还表明该合金相变后层裂强度没有明显的提高。Light gas gun plate impact experiments were conducted on a FeMnNi alloy and phase transition and spallation occurred. Transition pressure of this alloy obtained in the experiments （6. 3 6.9 GPa） is much lower than that of pure iron （13 GPa）, which demonstrats that the addition of Mn and Ni may lower the transition pressure strongly. Observation of the recovered samples shows that multiple spallations and shallow spallation may occur in the sample when the pressure is higher than the transition pressure of this alloy. Experimental results indicate that the spallation strength of this alloy doesn＇t increase distintly after phase transition.

关 键 词：固体力学 相变 锰铜计 FeMnNi合金 层裂 VISAR Hugoniot线 

分 类 号：O346.4[理学—固体力学]