期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 32, 期 10, 页码 1049-1053出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2016.01.018
关键词
Al-Cu-Li alloy; Aging process; Microstructure; Mechanical properties
资金
- National High Technology Research and Development Program of China [2013AA032401]
The effects of different aging processes on the microstructure and mechanical properties of a novel Al-Cu-Li alloy have been investigated by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. It is found that the tensile properties of a novel Al-Cu-Li alloy are sensitive to aging processes, which correspond to different microstructures. sigma (Al5Cu6Mg2) and T-1 (Al2CuLi) phases are the major precipitates for the alloy in T6 aging condition (165 degrees C/60 h). After duplex aging condition (150 degrees C/24 h + 180 degrees C/12 h), sigma, theta' (Al2Cu) and T-1 phases are detected. Only the T-1 phases can be found in the T8 state alloy (6% pre-strain+135 degrees C/60 h). The failure modes of alloy in T6 and duplex aging conditions are dimple-intergranular fracture, while typical quasi-cleavage fracture in T8 condition. Copyright (C) 2016, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.
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