Abstract
Herein, the Development of Refractory Complex Concentrated Alloys in the Al–Cr–Mo–Ta–Ti Alloy System is Reported. Alloys with Modified Al and Ta Concentrations Are Designed using CALPHAD Tools and Produced Via Arc Melting and Characterized in Both As-Cast and Annealed Forms. Properties of the Alloys, Nature of the Microstructures, and Phase Transformation Behavior Are Described Via X-Ray Diffraction, Microstructural Characterization, Microhardness, and Differential Scanning Calorimetry. Two Alloys, Namely, Al0.25CrMoTa0.8Ti and Al0.75CrMoTa0.8Ti, Are Represented by a Body-Centered-Cubic Matrix Phase after Annealing, along with a Secondary Cr–Ta Laves Phase of the C15 and C14 Polytypes, respectively. in As-Cast and Annealed Forms, the Al0.75CrMoTa0.45Ti Alloy Comprises a Single-Bcc Phase. Microhardness of the Laves Phase Containing Alloys Demonstrates Susceptibility to Cracking, Whereas the Al0.75CrMoTa0.45Ti Alloy Displays High Specific Hardness, Signs of Ductility as Evidenced by Slip Traces Near Indentations, and Minimal Scatter of Hardness Values.
Recommended Citation
A. E. Mann and J. W. Newkirk, "Compositional Modifications to Alter and Suppress Laves Phases in AlxCrMoTayTi Alloys," Advanced Engineering Materials, Wiley; Wiley-VCH Verlag, Jan 2023.
The definitive version is available at https://doi.org/10.1002/adem.202201614
Department(s)
Materials Science and Engineering
Keywords and Phrases
AlCrMoTaTi; refractory complex concentrated alloys; refractory high-entropy alloys; single-phase complex concentrated alloys
International Standard Serial Number (ISSN)
1527-2648; 1438-1656
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 Wiley; Wiley-VCH Verlag, All rights reserved.
Publication Date
01 Jan 2023
Comments
U.S. Department of Energy, Grant DE‐AR0001124