Material characteristics related to the fracture and particulation of electrodeposited-copper shaped charge jets.

摘要

Shaped charges with two different types of electrodeposited copper liners have been found to produce fragmented and particulated jets of poor quality. Results of tensile testing and chemical analysis of fracture surfaces of these materials show that segregated impurities cause grain boundary embrittlement (loss of ductility) under tensile loading. Increase in the embrittlement occurs with increase in test temperature over some temperature ranges. Good correlation between the fracture behavior and chemical analysis of the fracture surfaces of the materials and the degree of jet fracture and particulation is observed. This correlation suggests fracture and particulation of the shaped charge jets is primarily due to the segregated impurities in the electrodeposited materials. Results of the study suggest tensile testing at elevated temperature can be used to screen liner materials for optimum performance. 18 refs., 12 figs., 3 tabs.