张新明,罗智辉,杜予,叶凌英

• 1:中南大学材料科学与工程学院
• 2:中南大学材料科学与工程学院
• 3:中南大学材料科学与工程学院
• 4:中南大学材料科学与工程学院 湖南长沙410083

摘要(Abstract)：

采用金相、透射电镜、高温拉伸等检测手段研究了双级时效对1420铝锂合金组织及超塑性的影响,结果表明:与单级时效相比,双级时效处理得到分布更均匀、体积分数更大的析出相粒子。双级时效经过轧制和再结晶退火后,得到的晶粒尺寸为8~12μm;500℃条件下8×10-4s-1超塑性伸长率达到860%。第一级低温时效先在基体形成较均匀的细小粒子,这些粒子不仅在晶界,也在晶内大量析出。在高温时效时,这些粒子长大形成分布均匀,体积分数大的析出相粒子。

关键词(KeyWords)： 铝锂合金;双级时效;晶粒细化;超塑性

Abstract:

Keywords:

基金项目(Foundation): 国家重大基础研究资助项目(2005CB623706);; 国际科技合作重点资助项目(2006DFA53250)

作者(Author): 张新明,罗智辉,杜予,叶凌英

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