Research on Temperature Change and Microstructure Evolution of Bore in Steel Target Penetrated by Copper Jets
Copper fragments are found to adhere on penetration channel wall after copper jets penetrate steel target, and the research on it is helpful to know microstructure evolution of jets in the process of penetration and cooling time. This paper is based on the observation of bore in steel target penetrated by copper jets, and uses numerical simulation to study the process of copper jets penetration, then the change of temperature and grain size of jets adhered on penetration channel wall can be gotten, and the results agree with the observation of penetration channel wall taken by SEM. From the observations of copper and steel, we can get the conclusion that copper jets are not melted but have dynamic recrystallization in the process of penetration, then copper grain size increases obviously in cooling time, and twins are formed at the same time.
Jing Tao Wang, Roberto B. Figueiredo and Terence G. Langdon
H. Chen and G. Tao, "Research on Temperature Change and Microstructure Evolution of Bore in Steel Target Penetrated by Copper Jets", Materials Science Forum, Vols. 667-669, pp. 641-646, 2011