4.7 Article

Enhanced mechanical properties of ARB-processed aluminum alloy 6061 sheets by subsequent asymmetric cryorolling and ageing

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ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.08.003

关键词

Aluminum alloy 6061 sheet; Accumulative roll bonding; Asymmetric cryorolling; Ageing; Mechanical properties

资金

  1. URC small grant at the University of Wollongong
  2. Open Research Fund of the Key Laboratory of High Performance Complex Manufacturing, Central South University, China

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Grain size and precipitations affect the strength and ductility of ultrafine-grained materials. In this study, aluminum alloy 6061 sheets were fabricated using the accumulative roll bonding (ARB) technique. The ARB-processed sheets were subsequently subjected to cryorolling and asymmetric cryorolling. The sheets were further aged at 100 degrees C for 48 h. Mechanical tests show that a combination of asymmetric cryorolling and ageing results in significant improvement in both the ductility and the strength of the ARB-processed sheets. The microstructures of the sheets at different stages of the process were also analyzed using optical microscopy, scanning electron microscopy, transmission electron microscopy and X-ray diffraction in order to correlate the mechanical properties with the microstructure. (C) 2016 Elsevier B.V. All rights reserved.

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