A phase-field approach to study BCC precipitate evolution in FCC AlxCrFeNi medium entropy alloy including elastic effects

A phase-field approach to study BCC precipitate evolution in FCC AlxCrFeNi medium entropy alloy including elastic effects

A phase-field approach is presented to simulate the evolution of a BCC precipitate in an FCC matrix for AlxCrFeNi based medium entropy systems. The CALPHAD composition dependence of the Gibbs energies and diffusion mobilities for this quaternary alloy are introduced in the model using ThermoCalc wit...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:IOP conference series. Materials Science and Engineering 2022-07, Vol.1249 (1), p.012015
Hauptverfasser: Zuo, X, Moelans, N
Format: Artikel
Sprache:eng
Schlagworte:
Alloys
Body centered cubic lattice
Composition
Elastic properties
Entropy
Evolution
Face centered cubic lattice
Medium entropy alloys
Quaternary alloys
Quaternary systems
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:A phase-field approach is presented to simulate the evolution of a BCC precipitate in an FCC matrix for AlxCrFeNi based medium entropy systems. The CALPHAD composition dependence of the Gibbs energies and diffusion mobilities for this quaternary alloy are introduced in the model using ThermoCalc with TCHEA2 and MOBNI4 databases. Heterogeneous elastic properties are assumed for the FCC and BCC phase computed for the quaternary system. The effect of the elastic stresses due to lattice mismatch on precipitate shape, evolution and matrix composition is presented for a single BCC precipitate in and FCC matrix. We find that the elastic effects are considerable.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/1249/1/012015