Influence of the thermal treatment on the microstructure and hardness evolution of 7075 aluminium layers in a hot-rolled multilayer laminate composite

JOURNAL OF ALLOYS AND COMPOUNDS

卷:478

Article

Cepeda-Jimenez, C. M.¹  Pozuelo, M.²  Ruano, O. A.¹  Carreno, F.¹ 

[1] CSIC, CENIM, Dept Met Phys, Madrid 28040, Spain

[2] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

关键词: Aluminium alloys;    Thermomechanical processing;    Microstructure;    Mechanical properties;    EBSD analysis;   

DOI  :  10.1016/j.jallcom.2008.11.078

来源: Elsevier

【 摘 要 】

The microstructure and mechanical properties of the All 7075 alloy present in a hot roll-bonded laminate consisting of Al 7075/Al 2024 layers have been characterized by high resolution electron backscattering diffraction (EBSD) analysis and Vickers microhardness, respectively. The as-rolled deformation structure consisted in lamellar bands aligned parallel to the rolling direction. It was found that a post-rolling tempering at 175 degrees C/6 h, prior to the T6 treatment has a profound effect on the microstructure and the mechanical properties of the All 7075 alloy. This tempering reduces the driving force for recrystallization during the usual solution treatment of 30 min that is part of the T6 treatment. The performed procedures favour a more homogeneous precipitation during the following age hardening step and the achievement of a noticeable increase in Vickers microhardness. (C) 2008 Elsevier B.V. All rights reserved.

【 授权许可】

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