Mechanical properties of Al-Mg-Si alloy sheets produced using asymmetric cryorolling and ageing treatment

Authors

Hai-liang YU, University of WollongongFollow
A Kiet Tieu, University of WollongongFollow
Cheng Lu, University of WollongongFollow
Xiang-hua Liu, Northeastern University ChinaFollow
Ajit Godbole, University of WollongongFollow
Charlie Kong, University Of New South Wales

RIS ID

78136

Publication Details

YU, H., Tieu, A. Kiet., Lu, C., Liu, X., Godbole, A. & Kong, C. (2013). Mechanical properties of Al-Mg-Si alloy sheets produced using asymmetric cryorolling and ageing treatment. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 568 212-218.

Abstract

An asymmetric cryorolling technique was used to reduce the thickness of an Al-Mg-Si alloy sheet from 1.5 mm to 0.19 mm. The samples were subsequently aged for 48 h at 100 degrees celcius. The hardness and tensile strength of both rolled and aged sheets increased with the number of passes up to the sixth pass, but the tensile stress decreased after the seventh pass. Investigation of the microstructure of the sheets showed that the grain size after seven passes was about 235 nm and revealed the presence of Fe-Cr-Mn-Si particles in the samples. The deformation of Fe-Cr-Mn-Si particles and sheet thickness affects the ductility when the sheet thickness is less than 0.4 mm, and the strength when the thickness is less than 0.2 mm.