Phase evolution in an Al0.5 CrFeCoNiCu High Entropy Alloy
Change log
Authors
Jones, NG
Izzo, R
Mignanelli, PM
Christofidou, KA
Stone, HJ
Abstract
The phase evolution of an Al₀.₅CrFeCoNiCu High Entropy Alloy has been characterised following isothermal exposures between 0.1 and 1000 hours at temperatures of 700, 800 and 900˚C. The NiAl based B2 phase formed extremely quickly, within 0.1 hours at the higher exposure temperatures, whilst the Cr-rich σ phase formed more slowly. The solvus temperatures of these two phases were found to be ~ 975 and ~ 875˚C respectively. Compilation of the data presented here with results previously reported in the literature enabled the production of a time-temperature-transformation diagram, which clearly indicates that the diffusion kinetics of this material cannot be considered sluggish.
Description
Keywords
High-Entropy Alloys, Phase transformation, Heat treatment, Electron microscopy, Scanning
Journal Title
Intermetallics
Conference Name
Journal ISSN
0966-9795
1879-0216
1879-0216
Volume Title
71
Publisher
Elsevier BV
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/H500375/1)
Engineering and Physical Sciences Research Council (EP/H022309/1)
Engineering and Physical Sciences Research Council (EP/M005607/1)
Engineering and Physical Sciences Research Council (EP/H022309/1)
Engineering and Physical Sciences Research Council (EP/M005607/1)
The authors would like to thank K. Roberts and S. Rhodes for their assistance, and the EPSRC/Rolls-Royce Strategic Partnership (EP/M005607/1 and EP/H022309/1) for funding.