Accelerated screening of Tax(CoCrFeMnNi)1-x and Nbx(CoCrFeMnNi)1-x high-entropy alloys

High entropy alloys are a promising group of materials with seemingly limitless and unexplored composition spaces, capable of producing extraordinary physical/mechanical properties that exceed those of conventional materials. Utilizing an additive manufacturing enabled high throughput materials disc...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials processing technology 2023-10, Vol.319 (C), p.118017, Article 118017
Main Authors: Pegues, Jonathan W., Melia, Michael A., Whetten, Shaun R., Rodriguez, Mark A., Barrick, Erin J., Argibay, Nicolas, Kustas, Andrew B.
Format: Article
Language:English
Subjects:
Additive manufacturing
Alloy discovery
Rapid screening
Refractory high entropy alloys
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:High entropy alloys are a promising group of materials with seemingly limitless and unexplored composition spaces, capable of producing extraordinary physical/mechanical properties that exceed those of conventional materials. Utilizing an additive manufacturing enabled high throughput materials discovery framework, Ta and Nb graded additions to CoCrFeMnNi are explored. Compact metallurgical Ta,Nbx(CoCrFeMnNi)1-x specimens spanning x = 0 – 100 at.% were fabricated by powder based directed energy deposition. Microstructure evolution as a function of specific Ta,Nbx(CoCrFeMnNi)1-x compositions is investigated through a combination of XRD/XRF and SEM-EDS/EBSD. Microhardness measurements were also performed to rapidly establish baseline structure–property relationships. Results revealed that eutectic microstructures were largely suppressed throughout the explored composition ranges resulting in limited ductility and extraordinary hardness.
ISSN:0924-0136
DOI:10.1016/j.jmatprotec.2023.118017