杜子龙,曾卫东,杨文华,张超,史春玲,王浩军,周志平

• 1:凝固技术国家重点实验室
• 2:中航工业西安飞机工业(集团)有限责任公司

摘要(Abstract)：

采用TEM研究了时效处理对一种新型Al-Li-Cu系合金显微组织和力学性能的影响。结果表明:合金中的强化相主要有δ'相、T1相、θ'/θ″相、δ'/β'(Al3Zr)和T1/θ'相。随着时效时间的延长,首先析出大量θ″相和少量θ'相、δ'/β'相,35 h时θ″相减少,θ'相和δ'/β'相增加,37 h时主要为少量θ'相、T1/θ'相和大量T1相;随着时效温度的升高,首先析出大量δ'/β'相和少量θ″相、θ'相,143℃时以δ'、δ'/β'相和θ'相为主,148℃时主要为少量θ'相、T1/θ'相和大量T1相,合金的强度和塑性在143℃×35 h的时效条件下达到了较好的匹配。

关键词(KeyWords)： 铝锂合金;时效处理;强化相;力学性能

Abstract:

Keywords:

基金项目(Foundation): 教育部博士点基金项目(20116102110015)

作者(Author): 杜子龙,曾卫东,杨文华,张超,史春玲,王浩军,周志平

DOI: 10.13289/j.issn.1009-6264.2013.08.031

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