Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 620, Issue -, Pages 204-212Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.10.012
Keywords
Aluminum alloys; Mechanical properties; Solution treatment; Recrystallization annealing
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Funding
- National Natural Science foundation of China [51301027]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [14KJB430002]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Jiangsu Key Laboratory of Materials Surface Technology
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A novel production method of the Al-Mg-Si-Cu cold-rolled sheets was proposed in the present work, which was characterized by solution treatment substituting for conventional intermediate recrystallization annealing before the final cold-rolling of the sheets. After further solution and peak-ageing treatment, the newly produced 6061 Al sheets exhibited markedly higher mechanical properties (ultimate tensile strength (UTS): 454 MPa, yield strength (YS): 438 MPa and elongation (El): 13%) than those of the conventionally produced ones (UTS: 384 MPa, YS: 368 MPa and El: 11%). The quantitative estimation of strengthening mechanisms indicated that the increased peak-ageing strength of the newly processed 6061 alloy sheets was mainly attributed to their high average Taylor factor value, which resulted from the P texture with high volume fraction. Furthermore, the fracture characteristics of the newly produced and peak-aged 6061 alloy sheets were dominated by dimple induced cracking accompanied by small amount of intergranular cracking. (C) 2014 Elsevier B.V. All rights reserved.
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