高速撞击下无氧铜破坏机理实验研究  

Experimental investigation for damage mechanism of OFHC under high-velocity impact

作　　者：唐录成[1,2] 常敬臻[3] 潘晓霞[3] 刘占芳[1] 

机构地区：[1]重庆大学工程力学系,重庆400044 [2]中国工程物理研究院,四川绵阳621900 [3]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《功能材料》2009年第3期393-396,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(10572158)

摘　　要：采用Φ100mm一级轻气炮开展了无氧铜飞片撞击氧化铝陶瓷的一维应变冲击压缩实验,利用VISAR测试了样品的自由面质点速度历程。实验发现,在OFHC与陶瓷撞击时,OFHC飞片也可发生层裂,SEM分析表明其层裂方式为准解理断裂,在撞击区域OFHC的晶粒长大,并伴随孪晶生成,而且OF-HC在高速撞击下不会产生绝热剪切带和析出相,其原因是透射稀疏波在飞片中与飞片后界面反射的稀疏波迎面相遇形成拉伸波区所造成的。The shock compression experiments of alumina ceramics were carried out under 1D strain state by Φ100mm one-stage gas gun and free surface velocity histories of particles in alumina were measured by VISAR. The spallation has been observed on OFHC flyer when OFHC impact ceramics. The SEM results showed that the spallation mode was quasi-cleavage fracture and the grains grown in impact region with twins generation. Furthermore, the adiabatic shear band and the precipitated phase would not occurred by high-velocity impact be- cause of the transmission rarefaction wave encountered with reflection rarefaction wave in flyer and the rarefaction wave region.

关 键 词：OFHC 层裂 机理 

分 类 号：O347[理学—固体力学]