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

Authors

Hai Liang Yu, University of Wollongong, Central South UniversityFollow
Lihong Su, University of WollongongFollow
Cheng Lu, University of WollongongFollow
Anh Kiet Tieu, University of WollongongFollow
Hui Jun Li, University of WollongongFollow
Jintao Li, University of WollongongFollow
Ajit R. Godbole, University of WollongongFollow
Charlie Kong, University of New South Wales

RIS ID

109081

Publication Details

Yu, H., Su, L., Lu, C., Tieu, K., Li, H., Li, J., Godbole, A. & Kong, C. (2016). 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, 674 256-261.

Abstract

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 °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.