Microstructure and mechanical properties of extrusion state Al-Zn-Mg-Cu alloy after spray forming

doi:10.13251/j.issn.0254-6051.2020.07.035

Abstract

Abstract: Optimized microstructure characteristics and the mechanical properties of the Al-5.72Zn-2.36Mg-1.66Cu aluminium alloy prepared by spray forming and continuous extrusion were studied. The results show that the microstructure of the alloy matrix is uniformly refined and the morphology of the grains tends to be rounded. And the average grain size of the alloy is about 10 μm. The different effects of the solid solution strengthening and second-phase dispersion strengthening will be generated when the cooling condition of the alloy is changed by the rapid solidification. Thus,the overall properties of the alloy are also improved by spraying. The yield strength and tensile strength of the alloy are increased by about 20% on average, and the elongation is increased slightly.

Key words: Al-Zn-Mg-Cu aluminum alloy, spray forming, rapid solidification, microstructure, mechanical properties

CLC Number:

TG146.2

Pan Haicheng, Chen Yegao, Sun Xiaoxia, Fan Jun. Microstructure and mechanical properties of extrusion state Al-Zn-Mg-Cu alloy after spray forming[J]. Heat Treatment of Metals, 2020, 45(7): 173-176.

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