Temperature dependence of microstructure in Zn-Al alloys

Popović, Stanko and Gržeta, Biserka and Hanžek, Branko and Hajster, Snježana (1999) Temperature dependence of microstructure in Zn-Al alloys. Fizika A, 8 (3). pp. 173-182. ISSN 1330-0008

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Abstract

The temperature dependence of microstructure in Zn-Al alloys, transferred to the equilibrium state by quenching from the solid solution temperature, T_SS, to room temperature (RT) and prolonged ageing at RT, was studied in situ by X-ray powder diffraction. Instead of the phase transitions expected according to the phase diagram, namely α (M/β) + β -> α' + α(M/α') -> α_SS for the alloy with 54 at% Zn and α(M/β) + β -> α'+β -> α_SS for the alloy with 62 at% Zn, the following sequence was observed for both alloys: α(M/β) + β -> α' + β+ α(M/α', β) -> α'+β-> α_SS. In the cooling run, a temperature hysteresis in reversal phase transitions was observed. During a repeated heating, the microstructure depended on the previous thermal treatment of the alloys.

Item Type: Article
Keywords: Zn-Al alloys, solid solution, phase transition, phase diagram, X-ray powder diffraction
Date: 1999
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Publisher: Hrvatsko fizikalno društvo
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 14 Apr 2014 16:06
Last Modified: 14 Apr 2014 16:06
URI: http://digre.pmf.unizg.hr/id/eprint/813

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