刘振伟,朱超

• 1:中国科学院金属研究所

摘要(Abstract)：

人工时效前的室温停留,会对7475铝合金的人工时效产生一定的影响。通过电导率的测量,说明自然时效时由于GP区的弥散析出,导致样品的电导率持续下降;长时间室温停留后再进行人工时效时,由于GP区的形成,夺取一部分空位,使溶质原子扩散的驱动力减小,析出反应的表观激活能变大,电导率始终低于淬火后直接进行人工时效的样品。通过JMAK方程处理了所得数据,计算出重要的时效动力学参数tC和n,并说明了各自的影响因素。

关键词(KeyWords)： 7475铝合金;时效动力学;电导率;室温停留

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 刘振伟,朱超

DOI: 10.13289/j.issn.1009-6264.2010.02.022

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