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

卷:568

Article

Yu, Hai-liang^1,2  Tieu, A. Kiet¹  Lu, Cheng¹  Liu, Xiang-hua³  Godbole, Ajit¹  Kong, Charlie⁴ 

[1] Univ Wollongong, Sch Mech Mat & Mechtron Engn, Wollongong, NSW 2500, Australia

[2] Shenyang Univ, Sch Mech Engn, Shenyang 110044, Peoples R China

[3] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110004, Peoples R China

[4] Univ New S Wales, Electron Microscope Unit, Sydney, NSW 2250, Australia

关键词: Asymmetric cryorolling;    Al-Mg-Si alloy;    Sheet Mechanical property;    Ageing treatment;   

DOI  :  10.1016/j.msea.2013.01.048

来源: Elsevier

【 摘 要 】

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 C. 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. (C) 2013 Elsevier B.V. All rights reserved.

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