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

被引：3
作者：
Chemingui, Mahmoud [1 ]
Benkhenafou, Fethi [2 ]
Khitouni, Mohamed [1 ]
Jozwiak, Karol [3 ]
Mesmacque, Gerard [4 ]
Shi, MingQuan [5 ]
Douadji, Lyes [5 ]
机构：
[1] Fac Sci, Lab Inorgan Chem, Sfax, Tunisia
[2] Univ Tlemcen, Fac Sci, Dept Phys, Tilimsen, Algeria
[3] Warsaw Inst Aviat, Al Krakowska, Warsaw, Poland
[4] Lab Mecan Lille, Cite Sci Villeneuve dAscq, Lille, France
[5] Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Shuitu Town, Beibei Chongqin, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2018年 / 109卷 / 12期
关键词：
Al-Zn-Mg-Cu alloy; Heat treatment; Precipitation hardening; Microstructure; Plastic properties; GUINIER-PRESTON ZONES; 2-STEP AGING TREATMENT; MECHANICAL-PROPERTIES; DECOMPOSITION PROCESSES; ELECTRON-MICROSCOPE; PRECIPITATION; BEHAVIOR; EVOLUTION; PHASE; RECRYSTALLIZATION;
D O I：
10.3139/146.111709
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
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 degrees C, corresponding to the maximum hardness value, the alloy reveals a high volume fraction of small eta' precipitates. The minimum hardening is recorded after ageing at 350 degrees C. The radical change in the microstructure of the alloy influences its mechanical behaviour, especially in hardening and plasticity.
引用
收藏
页码：1113 / 1121
页数：9
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