Microstructural observations on the terminal penetration of long rod projectile

作     者：Krushna Kumbhar P.Ponguru Senthil A.K.Gogia 

作者机构：Armour Design and Development DivisionDefence Metallurgical Research LaboratoryHyderabad 500058India 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2017年第13卷第6期

页      面：413-421页

核心收录：

学科分类：0806[工学-冶金工程] 0817[工学-化学工程与技术] 08[工学] 082603[工学-火炮、自动武器与弹药工程] 0826[工学-兵器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0703[理学-化学] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Defence Research Development Organization(DRDO)for financial support to carry out this work at Defence Metallurgical Research Laboratory 

主　　题：Long rod projectile Terminal penetration Shear localization Adiabatic shear band Tungsten heavy alloy Armour steel 

摘      要：Present study focuses on the terminal penetration of tungsten heavy alloy(WHA) long rod penetrator impacted against armour steel at an impact velocity of 1600 m/s. The residual penetrator and armour steel target recovered after the ballistic test have been characterized using optical microscope, scanning electron microscope(SEM) and electron probe micro analyzer(EPMA). Metallurgical changes in target steel and WHA remnant have been analysed. Large shear stresses and shear localization have resulted in local failure and formation of erosion products. Severe plastic deformation acts as precursor for formation of adiabatic shear band(ASB) induced cracks in target steel. Recovered WHA penetrator remnant also exhibits severe plastic deformation forming localized shear bands, ASB induced cracks and shock induced cracks.