Enhancing the strength and sensitization resistance of 5xxx alloys via nanoscale clustering induced by room-temperature cyclic plasticity

被引：10
|
作者：
Zhang, Yong [1 ]
Zhu, Yuman [2 ]
Marceau, Ross K. W. [3 ]
Jiang, Lu [3 ]
Wang, Lingyu [4 ]
Gao, Xiang [2 ]
Zhang, Qi [2 ]
Hu, Linfeng [1 ]
Zhang, Ruifeng [5 ]
Hutchinson, Christopher [2 ]
Sun, Wenwen [1 ,2 ]
机构：
[1] Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Adv Met Mat, Nanjing 211189, Peoples R China
[2] Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia
[3] Deakin Univ, Inst Frontier Mat, Geelong, Vic 3126, Australia
[4] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
[5] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 227卷
基金：
中国国家自然科学基金; 澳大利亚研究理事会;
关键词：
Aluminum alloys; Al; -Mg; Corrosion; Cyclic strengthening; Precipitation; Atom probe tomography; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; FATIGUE LIFE; 5083-H321; MIG; MICROSTRUCTURE; PRECIPITATION; IMPROVEMENT;
D O I：
10.1016/j.corsci.2023.111729
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Non-heat-treatable 5xxx Al alloys exhibit good corrosion resistance but can be susceptible to intergranular corrosion in service. This study applies a cyclic strengthening method to the AA5083 alloy, resulting in a significant increase in yield strength (-300 MPa) and tensile strength (-385 MPa) due to the formation of Mg-Al solute clusters confirmed by scanning transmission electron microscopy and atom probe tomography. After a two-month sensitization treatment at 70 degrees C, the clusters delay the formation of Mg-rich precipitates at grain boundaries, enhancing the resistance to sensitization. This new approach strengthens Al-Mg alloys and offers potential for manipulating the corrosion resistance and sensitization susceptibility.
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页数：12
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