给定压力下纯铁材料的冲击相变与层裂特性研究  

Study on Phase Transition and Spallation of Pure Iron under Given Pressure

作　　者：陈永涛[1] 李庆忠[1] 唐小军[1] 卢秋虹[2] 

机构地区：[1]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国防科技重点实验室,四川绵阳621900 [2]中国科学院金属研究所材料科学国家实验室,辽宁沈阳110016

出　　处：《高压物理学报》2010年第3期213-218,共6页Chinese Journal of High Pressure Physics

基　　金：中物院发展基金(2009B0201014,20060104);国家自然科学基金(10776032,10902102)

摘　　要：采用VISAR测量样品自由面速度剖面和回收样品观测分析联合技术,开展等厚对称碰撞实验,结合文献中的实验结果,研究了冲击加载压力大于纯铁材料冲击相变阈值约2-5 GPa和大于冲击相变阈值约10 GPa两种压力状态下纯铁材料的加卸载历程及各相区的变化,并从应力波相互作用的角度,指出了冲击加载压力略大于纯铁材料相变阈值约2 GPa时,等厚对称碰撞样品＂反常＂二次层裂与冲击相变及逆相变的关联机制。By means of VISAR and metallography,phase transition and saplling behavior in pure iron under the given pressure were studied through symmetric and same thickness flyer/sample experiments.In combination with the experimental results from references,and the loading and unloading histories and phase structure in iron sample are obtained.The given pressure are beyond the phase transition pressure of 13 GPa about 2-5 GPa and 10 GPa,respectively.Abnormal multiple saplling behavior happens in the pure iron sample as the impact pressure beyond the phase transition pressure of 13 GPa about 2 GPa.From the interaction process of stress waves,the contacting mechanism among the spalling behavior and the phase transition and the reverse phase transition have been studied.

关 键 词：纯铁 冲击相变 逆相变 层裂 

分 类 号：O347.3[理学—固体力学]