期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 873, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159765
关键词
Al-Cu-Li alloy; Laser beam remelting; Corrosion; Mechanical property
资金
- National Natural Science Foundation of China [51801160]
- Aeronautic Science Foundation of China [2017ZF53066]
Aging treatment reduces the corrosion resistance of laser beam remelted 2A97 Al-Cu-Li alloy, while the strength and hardness increase with aging temperature, and the ductility decreases distinctly.
The present work analyzed the effect of aging on the corrosion and mechanical properties of laser beam remelted 2A97 Al-Cu-Li alloy. Electrochemical measurements and immersion tests were performed to study the corrosion behavior. Tensile and microhardness tests were used to investigate the strength, ductility, and hardness of the specimens. We found that the corrosion degree declines dramatically from the edge to center of the fusion zone, and the EQZ is most sensitive to localized corrosion. The corrosion resistance of the fusion zone is lowered by aging treatment. Moreover, the dominant corrosion feature transforms from intergranular corrosion to pitting corrosion by 175 degrees C of aging. The strength and hardness increase with aging temperature while the ductility declines distinctly. Our work can provide an in-depth understanding of the effect of aging on the corrosion and mechanical behaviors of laser beam remelted Al-Cu-Li alloys. (c) 2021 Elsevier B.V. All rights reserved.
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