Revealing foundations of the intergranular corrosion of 5XXX and 6XXX Al alloys

被引：18
作者：
Fan, Letian [1 ]
Ma, Jijun [1 ]
Zou, Chengxiong [2 ]
Gao, Jun [1 ]
Wang, Haisheng [1 ]
Sun, Jing [1 ]
Guan, Quanmei [1 ]
Wang, Jun [2 ]
Tang, Bin [2 ]
Li, Jinshan [2 ]
Wang, William Yi [2 ]
机构：
[1] CRRC Tangshan Co LTD, R&D Ctr, Tangshan 063035, Peoples R China
[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
MATERIALS LETTERS | 2020年 / 271卷 / 271期
基金：
中国国家自然科学基金;
关键词：
Corrosion; Grain boundary; Intergranular corrosion; Precipitations; Pitting; Cracks; ALUMINUM-ALLOYS; BOUNDARY; STRENGTH;
D O I：
10.1016/j.matlet.2020.127767
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Here, the nature of intergranular corrosion features and mechanisms for commercial 5083-H111, 6082-T6 and 6005A-T6 Al alloys are investigated comprehensively, supporting foundations for their management and maintenances under environmental conditions. It is found that the localized corrosions including the pitting, intergranular corrosion (IGC), exfoliation together with their coupling effects tend to the follow the direction and the morphology of precipitations and the elongated rolling/extrusion directions, suggesting grain refinement would be an effective approach to enhance the strength and IGC resistance. The microstructure characterizations and orientation statistics reveal the indicators improving durability and damage tolerance properties in the development of advanced Al alloys.
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页数：5
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