HR2钢及几种铁基材料的冲击相变行为  

Experimental studies on shock-induced phase transition in HR2 and other Fe-based materials

作　　者：唐小军[1] 胡海波[1] 李庆忠[1] 张兴华[2] 唐志平[2] 胡八一[1] 汤铁钢[1] 

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实验室,四川绵阳621900 [2]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230026

出　　处：《爆炸与冲击》2006年第2期115-120,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10176029);中国工程物理研究院面上基金项目(20030102)

摘　　要：利用双灵敏度VISAR测量了抗氢钢HR2、工业纯铁DT2和铁锰镍合金FeMnNi在一维应变冲击载荷下的自由面速度历史,结合受载样品的回收分析对其动载行为和断裂表现进行了分析。研究表明,在实验加载压力范围内DT2和FeMnNi样品的自由面速度历史呈现包括相变波在内的典型三波结构,而对HR2钢,尽管金相分析显示其加载前后样品的相组织已发生变化,但速度剖面呈现的仅是典型的弹塑性双波结构。分析认为溶质材料成分和初始相组织是无相变波的主要原因。从冲击相变和卸载逆相变角度解释了在等厚靶碰撞时DT2和FeMnNi材料中出现的多重层裂、浅表层裂现象。The free-surface velocity profiles of HR2, DT2 and FeMnNi under one-dimensional shock loading were measured by using double-sensitivity VISAR. Combined with the analysis of recovered fragments, dynamic behaviors and spallation phenomena of these materials were studied. Typical triple-wave configurations with phase transition were recorded in DT2 and FeMnNi, but only elasticplastic double waves were observed in HR2, although the metallographic characters were changed after impact. Multi-spallation and shallow spallation phenomena of DT2 and FeMnNi under homo-thickness target impact were discussed.

关 键 词：固体力学 冲击相变 双灵敏度VISAR HR2抗氢钢 铁基材料 自由面速度 层裂 

分 类 号：O347.4[理学—固体力学]