Formation of complex intermetallic phases in novel refractory high-entropy alloys NbMoCrTiAl and TaMoCrTiAl: Thermodynamic assessment and experimental validation

• Published in: Journal of alloys and compounds Vol. 842; p. 155726
• Main Authors: Müller, Franz, Gorr, Bronislava, Christ, Hans-Jürgen, Chen, Hans, Kauffmann, Alexander, Laube, Stephan, Heilmaier, Martin
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 25.11.2020; Elsevier BV
• Subjects: Alloy systems; Alloys; Calphad method; Complex intermetallic phases; Compositionally complex alloys; Computer simulation; Electron backscatter diffraction; Equilibrium conditions; High entropy alloys; Intermetallic phases; Laves phase; Molybdenum; Niobium; Phase diagrams; Phase volume fraction; Polytypes; Quinary systems; Refractory alloys; Refractory high-entropy alloys; Tantalum; Thermodynamic models; Titanium; X ray powder diffraction; Complex intermetallic phases; Refractory high-entropy alloys; Compositionally complex alloys; Calphad method

In this work, we present the results of the thermodynamic assessment of two equiatomic refractory High Entropy Alloys (HEAs), namely TaMoCrTiAl and NbMoCrTiAl, in the temperature range between 700 and 1500 °C. Particular attention is paid on the constitution of the intermetallic phases stable in the...