A Novel Cu-Containing Al0.5CrCuFeV High-Entropy Alloy with a Balanced Strength-Ductility Trade-Off

A novel 3 d transition metal high-entropy alloy (3 d tm HEA), Al0.5CrCuFeV, was prepared by vacuum arc-melting. Its phase components, microstructure, and compressive properties in the as-cast and annealed states were investigated. The results indicated that the microstructure consisted of primary BC...

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Bibliographic Details
Published in:Physics of metals and metallography 2021-12, Vol.122 (13), p.1338-1341
Main Authors: Yi, J. J., Yang, L., Xu, M. Q., Wang, L.
Format: Article
Language:English
Subjects:
Annealing
Body centered cubic lattice
Chemistry and Materials Science
Compressive properties
Diffusion
Ductile-brittle transition
Ductility
Electric arc melting
Elongation
Face centered cubic lattice
High entropy alloys
Materials Science
Mechanical properties
Metallic Materials
Microstructure
Phase Transformations
Structure
Transition metal alloys
Transition metals
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Summary:A novel 3 d transition metal high-entropy alloy (3 d tm HEA), Al0.5CrCuFeV, was prepared by vacuum arc-melting. Its phase components, microstructure, and compressive properties in the as-cast and annealed states were investigated. The results indicated that the microstructure consisted of primary BCC dendrites with a volume fraction of 88% and minor FCC Cu-enriched regions that formed a net-like framework. In both the as-cast and annealed states, the alloy possessed a balance between its yield strength (1360 MPa) and ductility (9.1% elongation). Annealing modified the elemental distribution without changing the mechanical properties, implying that the microstructure morphology, not the elemental distribution, played a dominant role in determining the macro-mechanical behavior.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X21130111