Effect of Solution Treatment on Second Phase Dissolution for an Al-9.2Zn-2.0Mg-1.9Cu Alloy

Hong Wei Liu; Kai Wen; Xi Wu Li; Zhi Hui Li; Li Zhen Yan; Hong Wei Yan; Yong An Zhang; Bai Qing Xiong

doi:10.4028/www.scientific.net/MSF.993.321

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HomeMaterials Science ForumMaterials Science Forum Vol. 993Effect of Solution Treatment on Second Phase...

Effect of Solution Treatment on Second Phase Dissolution for an Al-9.2Zn-2.0Mg-1.9Cu Alloy

Abstract:

The second phase dissolution of Al-9.2Zn-2.0Mg-1.9Cu alloy conducted by various temperatures of 2h was researched with the help of optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), electrical conductivity and differential scanning calorimetry (DSC) analysis. The results gave rise to the second phase existence of Mg(Zn,Cu,Al)₂ and Fe-containing phases in the as-extruded alloy. When the alloy solution treated with a temperature varied from 450°C to 470°C, a small quantity of Mg(Zn,Cu,Al)₂ phase still existed in the alloy while its content exhibited a decrement trend with the solution temperature rose. For the alloy solution treated at a temperature of 475°C, Mg(Zn,Cu,Al)₂phase dissolved into the matrix completely while Fe-containing phase still remained. The electrical conductivity of quenched alloy decrease with the solution temperature increase and reached a minimum value at 470°C, and then rose slightly for the solution temperature of 475°C.

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Materials Science Forum (Volume 993)

Pages:

321-326

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.993.321

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Online since:

May 2020

Authors:

Hong Wei Liu, Kai Wen*, Xi Wu Li, Zhi Hui Li, Li Zhen Yan, Hong Wei Yan, Yong An Zhang, Bai Qing Xiong

Keywords:

Al-Zn-Mg-Cu Alloy, Microstructure, Second Phase Dissolution, Solution Treatment

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