Effect of heat treatment on microstructure, hardening and plasticity of a commercial Al–Zn–Mg

Effect of heat treatment on microstructure, hardening and plasticity of a commercial Al–Zn–Mg–Cu alloy

Published:2018-11-29 Issue:12 Volume:109 Page:1113-1121
ISSN:2195-8556
Container-title:International Journal of Materials Research
language:en
Short-container-title:

Author:

Chemingui Mahmoud¹,Benkhenafou Fethi²,Khitouni Mohamed¹,Jozwiak Karol³,Mesmacque Gérard⁴,Shi MingQuan⁵,Douadji Lyes⁵

Affiliation:

1. Laboratory of Inorganic Chemical , Faculty of Sciences, Sfax , Tunisia

2. Department of physics , Faculty of Sciences, University of Tlemcen, Tlemcen , Algeria

3. Warsaw Institute of Aviation , al. Krakowska, Warsaw , Poland.

4. Laboratoire de Mécanique de Lille , Cité Scientifique Villeneuve d'Ascq, Lille , France

5. Chongqing Institute of Green and Intelligent Technology , Chinese Academy of Sciences, Shuitu Town, Beibei Chongqing District , P.R. China

Abstract

Abstract The effect of the heat treatment on the microsturucture and the mechanical response of a commercial Al–Zn–Mg–Cu alloy (AA7075) was studied. The influence of annealing on the hardening and plastic properties of Al–Zn-Mg–Cu alloy was investigated by indentation and tensile tests. The microstructural evolution of the alloy was examined by meant of optical, scanning and transmission electron microscopies. After various ageing states, the Al–Zn–Mg–Cu alloy showed significant changes in microstructure and mechanical behaviour. After quenching, the microstructure was characterized by high ductility. Following ageing at 140 °C, corresponding to the maximum hardness value, the alloy reveals a high volume fraction of small η′ precipitates. The minimum hardening is recorded after ageing at 350 °C. The radical change in the microstructure of the alloy influences its mechanical behaviour, especially in hardening and plasticity.

Publisher

Walter de Gruyter GmbH

Subject

Materials Chemistry,Metals and Alloys,Physical and Theoretical Chemistry,Condensed Matter Physics

Link

https://www.degruyter.com/document/doi/10.3139/146.111709/pdf

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