Effect of pre-deformation on age-hardening behaviors in an Al-Mg-Cu alloy

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:820

Article

Chen, Xuanliang¹  Kim, Daehan²  Minho, O.¹  Marioara, Calin D.³  Andersen, Sigmund J.³  Lervik, Adrian⁴  Holmestad, Randi⁴  Kobayashi, Equo¹ 

[1] Tokyo Inst Technol, Dept Mat Sci & Engn, Meguro Ku, 2-12-1-S8-18 Ookayama, Tokyo 1528552, Japan

[2] Korea Inst Ind Technol, Carbon & Light Mat Applicat Grp, 222 Palbok Ro, Jeonju Si 54896, South Korea

[3] SINTEF Ind, Mat & Nanotechnol, Hogskoleringen 5, N-7465 Trondheim, Norway

[4] Norwegian Univ Sci & Technol, Dept Phys, Hogskoleringen 5, N-7491 Trondheim, Norway

关键词: Aluminum alloys;    Plasticity methods;    Phase transformation;    Hardness;    Thermal analysis;    Electron microscopy;   

DOI  :  10.1016/j.msea.2021.141557

来源: Elsevier

【 摘 要 】

The effects of 3%-50% pre-deformation following solution heat treatment on the age hardening of an Al-3Mg1Cu alloy have been investigated by Vickers microhardness measurement, tensile tests, differential scanning calorimetry, scanning electron microscopy, and transmission electron microscopy. Pre-deformation has a strong effect on subsequent age-hardening behavior. The precipitation was accelerated, hardness peaks appeared earlier, formation of clusters was inhibited, and a larger fraction of precipitates was observed along the dislocation lines. The contribution of the precipitates to the hardness was evaluated by dissolution tests. It was found that pre-deformation followed by artificial aging resulted in a good strength-elongation balance. The results are significant for the development of combined mechanical deformation and heat treatment processes.

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