Temperature dependence of microstructure in Zn-Al alloys

Scientific paper - Original scientific paper

• Author: Stanko Popović
• Author: Biserka Gržeta
• Author: Branko Hanžek
• Author: Snježana Hajster
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): Zn-Al alloys; solid solution; phase transition; phase diagram; X-ray powder diffraction
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review
• Publication version: Published version
• Journal title: Fizika A
• Numbering: vol. 8, no. 3, pp. 173-182
• p-ISSN: 1330-0008
• URN:NBN: urn:nbn:hr:217:974557
• Publication: 1999
• Document URL: http://fizika.hfd.hr/fizika_a/av99/a8p173.htm
• Type of resource: Text
• Access conditions: Open access
• Created on: 2019-10-09 12:24:09