罗新民,张静文,马辉,张永康,陈康敏,任旭东,罗开玉

• 1:江苏大学材料科学与工程学院
• 2:江苏大学机械工程学院
• 3:江苏大学分析测试中心

摘要(Abstract)：

利用输出波长为1064 nm、脉冲宽度为20 ns的钕玻璃YAG激光,对2A02铝合金进行了表面冲击试验。通过对激光冲击处理试样的HREM高分辨像观察,分析了激光冲击2A02铝合金材料微结构中的空位现象。结果表明,考察区域在激光冲击超高应变率作用下,在形成大量位错的同时,伴随形成相应的空位;空位片成为激光冲击超高应变率形变条件下铝合金基体中的特征微结构;空位和位错的重组作用加剧了点阵畸变,引起的第三类内应力和纳晶化提高了激光冲击表面的硬度和残余压应力。

关键词(KeyWords)： 铝合金;激光冲击强化;微结构;空位;位错

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50735001;50905080)

作者(Author): 罗新民,张静文,马辉,张永康,陈康敏,任旭东,罗开玉

DOI: 10.13289/j.issn.1009-6264.2012.01.006

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