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Effect of heat treatment on microstructure, hardening and plasticity of a commercial Al-Zn-Mg-Cu alloy
Chemingui, Mahmoud1; Benkhenafou, Fethi2; Khitouni, Mohamed1; Jozwiak, Karol3; Mesmacque, Gerard4; Shi, MingQuan5; Douadji, Lyes5
2018-12-01
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.
关键词Al-Zn-Mg-Cu alloy Heat treatment Precipitation hardening Microstructure Plastic properties
DOI10.3139/146.111709
发表期刊INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
ISSN1862-5282
卷号109期号:12页码:1113-1121
通讯作者Douadji, Lyes(ldouadji@yahoo.fr)
收录类别SCI
WOS记录号WOS:000452550100004
语种英语