Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 556, Issue -, Pages 796-800Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2012.07.069
Keywords
Aluminum alloy; Aging; Precipitation
Categories
Funding
- National Key Basic Research Program [2010CB731702]
- Program for New Century Excellent Talents in University [NCET-10-0838]
- Sheng-hua Yu-ying Program
- Graduate Degree Thesis Innovation Foundation of Central South University [2011ssxt094]
- State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, China [2012-P04]
Ask authors/readers for more resources
The uniaxial tensile creep tests of Al-Cu-Mg alloy were carried out over a wide range of temperature and applied stress. The effects of applied stress and creep aging temperature on the precipitation in Al-Cu-Mg alloy were discussed. It is found that the precipitation process is very sensitive to the applied stress and creep aging temperature, and S phase (CuMgAl2) is the main precipitate under the tested creep conditions. With the increase of applied stress and creep aging temperature, S phase easily grows up and becomes sparse. Meanwhile, the creep aging leads to the discontinuous distribution of precipitation phase in grain boundary, which can improve the corrosion-resistance of Al-Cu-Mg alloy. Because the lattice misfit of acicular exudation phase is far less than that of disk-shaped phase, the applied stress/strain fields will alert the competitive precipitation equilibrium between different strengthening phases. So, the large applied stress and high aging temperature easily make the preferential precipitation process as SSS -> GPB -> S '' -> S' -> S. (c) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available