期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 527, 期 13-14, 页码 3073-3078出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.02.001
关键词
Accumulative roll bonding; Laminated composite; Mechanical properties; Microstructure
类别
资金
- National Nature Science Foundation of China [50571031]
- China Scholarship Council (CSC) [2007-3086]
- German Academic Exchange Service (DAAD) [2007-3086]
- New Century Excellent Talents in University in China [NCET-08-0169]
The Mg/Al laminated composite was fabricated by the accumulative roll bonding (ARB) using the pure magnesium and Al5052 alloy at 400 degrees C. Tensile properties along rolling direction and the transverse direction and the microhardness were evaluated at the ambient temperature. The tensile strength of the laminated Mg/Al composite along both directions increased gradually till two ARB cycles, but then decreased after the third ARB cycles. Optical microscopy and scanning electron microscopy (SEM) were utilized to reveal the microstructure evolution and the failure mechanism. Grain refinement of Mg layers was not obvious during the ARB process due to the high temperature and interval reheating. The obvious crack at the coarse intermetallic compounds and rupture of the Al layer after the third cycle led to the premature failure of the sample along the rolling direction during the tensile test. (C) 2010 Elsevier B.V. All rights reserved.
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