A Phase-Field Model for Phase Transformations in Glass-Forming Alloys

TitleA Phase-Field Model for Phase Transformations in Glass-Forming Alloys
Publication TypeJournal Article
Year of Publication2012
AuthorsWang T, Napolitano RE
Journal TitleMetallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
Volume43A
Pages2662-2668
Date Published08
Type of ArticleArticle; Proceedings Paper
ISBN Number1073-5623
Accession NumberWOS:000305732900018
Keywordsability, amorphous-alloys, bulk metallic glasses, computer-simulation, cu-zr alloys, dynamics, grain-growth, liquid, solidification, transition
Abstract

A phase-field model is proposed for phase transformations in glass-forming alloys. The glass transition is introduced as a structural relaxation, and the competition between the glass and crystalline phases is investigated. The simulations are performed for Cu-Zr alloys, employing thermodynamic and kinetic parameters derived from reported thermodynamic modeling and molecular dynamics simulation results,[1-3] respectively. Four distinct phase fields are treated with a multi-phase-field approach, representing the liquid/glass, Cu10Zr7, CuZr, and CuZr2 phases. In addition, a continuum-field method is applied to the liquid to accommodate the liquid-glass transformation. The combined phase-field approach is used to investigate the glass formation tendency, and critical cooling rates are estimated and compared with the reported experimental values.

URL<Go to ISI>://WOS:000305732900018
DOI10.1007/s11661-012-1136-2
Alternate JournalMetall. Mater. Trans. A-Phys. Metall. Mater. Sci.