铜射流侵彻穿孔处的温度及微观组织研究  

Temperature Change and Microstructure Evolution of the Bore Penetrated by Copper Jets

作　　者：陈昊[1] 陶钢[1] 

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《高压物理学报》2011年第4期344-350,共7页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(10802038)

摘　　要：分析金属射流侵彻钢靶后钢靶孔壁上残留的射流材料的微观组织,将有助于了解射流的超塑性动态变形以及射流在侵彻和冷却过程中的状态变化。通过对铜射流侵彻钢靶时钢靶侵彻孔壁处的组织进行分析,利用数值模拟和理论计算,对铜射流的侵彻过程进行研究,得到了侵彻后孔壁上铜射流的温度及晶粒度的变化曲线,分析结果与扫描电镜的观察结果吻合。通过对孔壁处铜和钢的微观组织进行观察,判断出铜射流在侵彻时没有发生熔化,而是发生了动态再结晶,并且晶粒在随后的冷却过程中发生了明显的长大,此外在铜冷却过程中也产生了孪晶。After metal jets penetrate the steel target, the jets＇ material adheres on the penetration channel wall. The research on the jets＇ material is helpful to analyzing the dynamic superplastic deformation and morphological changes of jets in the process of penetration and cooling. Theoretical computation and numerical simulation are used in this work to study the penetration process of copper jets,and the changes of temperature and grain size of copper jets adhered on the penetration channel wall are obtained. The simulated results are in good agreement with the SEM （Scanning Electron Microscope） observation. From the observation of microstructure of copper and steel, we can get the conclusion that the copper jets do not melt but instead undergo dynamic recrystallization in the process of penetration. In addition,the copper grain size increases obviously and the twins are formed in the cooling process.

关 键 词：射流 侵彻 动态再结晶 孪晶 

分 类 号：O358[理学—流体力学]