The deformation and work hardening behaviour of a SPD processed Al-5Cu alloy

JOURNAL OF ALLOYS AND COMPOUNDS

卷:697

Article

Jia, Hailong¹  Bjorge, Ruben²  Marthinsen, Knut¹  Li, Yanjun¹ 

[1] Norwegian Univ Sci & Technol NTNU, Dept Mat Sci & Engn, N-7491 Trondheim, Norway

[2] SINTEF Mat & Chem, N-7465 Trondheim, Norway

关键词: Aluminium alloy;    ECAP;    Bimodal grain structure;    Tensile properties;   

DOI  :  10.1016/j.jallcom.2016.11.353

来源: Elsevier

【 摘 要 】

An Al-5 wt.% Cu alloy supersaturated with Cu in solid solution was subjected to equal channel angular pressing (ECAP). The microstructural evolution was systematically investigated by backscattered electron (BSE) imaging, electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). It is revealed that a bimodal grain structure composed of coarse micron-sized grains and submicron-sized grains was developed after four passes of ECAP. Tensile testing showed that a high ultimate tensile strength of similar to 500 MPa, a high elongation to failure of similar to 28% and a uniform elongation of similar to 5% were achieved simultaneously. The deformation behaviour and the grain structure evolution during ECAP, the strengthening mechanisms of the as-deformed material, and especially, the role played by a high content of Cu have been discussed. (C) 2016 Elsevier B. V. All rights reserved.

【 授权许可】

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