李茂华,杨延清,唐昌平,陈志龙,莫家璇

• 1:湖南科技大学高温耐磨材料及制备技术湖南省国防科技重点实验室
• 2:西北工业大学材料学院

摘要(Abstract)：

利用透射电镜(TEM)、能谱仪(EDX)、选区电子衍射(SAED)、微束衍射(μ-D)、高分辨透射电镜(HRTEM)和高角环形暗场扫描透射电镜(HAADF-STEM)等研究了航空用7475-T761铝合金的微观组织。结果表明,7475-T761铝合金的组织主要由弥散相、时效强化相和杂质相组成。弥散相为形态多样的E相(Al_(18)Cr_2Mg_3),且E/Al相界面易非均匀析出η相。时效强化相主要为GPⅡ区、η′相和η相。杂质相主要由Al_7Cu_2Fe、FeAl_3和富Si相组成。

关键词(KeyWords)： 7475铝合金;弥散相;时效强化相;杂质相

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52075167)

作者(Author): 李茂华,杨延清,唐昌平,陈志龙,莫家璇

DOI: 10.13289/j.issn.1009-6264.2021-0137

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