用Nadezhda-2强流脉冲电子束轰击不同预变形量的纯铝表面,对铝表面的结构缺陷和轰击后产生的表面熔坑进行了系统的表征,研究了表面熔坑与结构缺陷之间的关系.结果表明,结构缺陷对表面熔坑的形成有重要的影响,熔坑的数量随着结构缺陷数量的增加而增加,并且有沿晶界和高位错密度区择优形成的趋向,结构缺陷是表面熔坑形成的萌芽.另外,强流脉冲电子束还能在晶界和滑移带上诱发出大量由于空位聚集而产生的孔洞.
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