Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 605, Issue -, Pages 192-202Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.03.055
Keywords
Creep-aging; Aluminum alloy; Corrosion resistance; Mechanical property; Nanoprecipitate
Categories
Funding
- National Natural Science Foundation Council of China [51125021]
- National Key Basic Research Program [2010CB731702]
- Sheng-hua Yu-ying Program of Central South University
- State Key Laboratory of Materials Processing and Die & Mold Technology, Huazhong University of Science and Technology, China [2012-P04]
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Creep-aging forming, combining both the aging treatment and forming process, has recently drawn much attention of researchers. In this study, the effects of creep-aging processing on the corrosion resistance and mechanical properties of a typical Al-Cu-Mg alloy (2024 aluminium alloy) are investigated by electrochemical corrosion, exfoliation corrosion and uniaxial tensile experiments. The results show that the corrosion resistance and mechanical properties of the studied Al-Cu-Mg alloy are strongly sensitive to the creep-aging processing parameters. The creep-aging processing can change the dimension and density of nanoprecipitates, which greatly affects the corrosion resistance and mechanical properties of the studied Al-Cu-Mg alloy. With the increase of creep-aging temperature, the corrosion resistance and the elongation decrease, while the yield strength and ultimate tensile strength increase. For the materials creep-aged in under aging and peak aging conditions, the applied stress can increase the ultimate tensile strength, but deteriorate the corrosion resistance. (C) 2014 Elsevier B.V. All rights reserved.
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