High-strength and anti-corrosion of Al-Cu-Mg alloy by controlled ageing process

被引：10
作者：
Shi, Weining [1 ]
Zhou, Haifei [2 ]
Zhang, Xinfang [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, State Key Lab Adv Met, Beijing 100083, Peoples R China
[2] Zhejiang Elect Power Corp, Res Inst, Hangzhou, Zhejiang, Peoples R China
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2019年 / 99卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Ageing treatment; precipitates; intergranular corrosion; pitting corrosion; CORROSION BEHAVIOR; INTERGRANULAR CORROSION; HYDROGEN; PHASE;
D O I：
10.1080/09500839.2019.1662960
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The evolution of strength and corrosion behaviour induced by ageing treatment in Al-Cu-Mg alloy is poorly understood. In this work, correlations among strength, intergranular corrosion and pitting corrosion induced by precipitates were studied by various corrosion performance tests and hardness tests. The susceptibility of intergranular corrosion is decreased and pitting corrosion sensitivity is increased as the ageing temperature and time are increased. Retrogression and re-ageing treatments not only transform the size of the intragranular precipitates from greater than 500 nm to be less than 10 nm but also lead to the discontinuous distribution of grain boundary precipitates. The microstructural changes in the grain interior and grain boundary together promote the Al-Cu-Mg alloys to have high-strength and excellent resistance to intergranular corrosion and pitting corrosion.
引用
收藏
页码：235 / 242
页数：8
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