采用53式7.62 mm穿燃弹斜入射一种高铜铝合金板,弹速为818 m/s.利用光学显微镜和扫描电镜观察铝板侵彻后的弹坑微观组织.结果表明:弹靶接触表面有熔化物,成分为靶材与弹丸的混合物;在侵彻的不同深度,弹坑微观组织呈现不同的特征,入口处晶粒被拉长,中间处的晶粒发生剧烈扭折,局部出现绝热剪切带,底部观察到形变显微带以及异常长大晶粒;靶板主要发生塑性扩孔型破坏.
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