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

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:674

Article

Yu, Hailiang^1,2  Su, Lihong²  Lu, Cheng²  Tieu, Kiet²  Li, Huijun²  Li, Jintao²  Godbole, Ajit²  Kong, Charlie³ 

[1] Cent S Univ, State Key Lab High Performance Complex Mfg, Changsha 410083, Hunan, Peoples R China

[2] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2500, Australia

[3] Univ New South Wales, Elect Microscope Unit, Sydney, NSW 2052, Australia

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

DOI  :  10.1016/j.msea.2016.08.003

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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