Calvo-Dahlborg, M., Dahlborg, U., Cornide, J. et al. (7 more authors) (2020) Structural investigation of the stability in temperature of some high entropy / multi major components alloys as a function of their electronic structure. Journal of Alloys and Compounds, 837. 155496. ISSN 0925-8388
Abstract
High Entropy Alloys (HEA) can be classified in three domains according to their e/a and r values, with e/a, the number of itinerant valence electrons and r the average radius for a 12 nearest atoms neighborhood. The phase composition, thermal stability and possible phase transformations of a series of HEA alloys, CoCrzFeNi-XY (with X and Y = Al, Cu, Pd, Ru, Ti and z = 0 or 1), selected according to their e/a ratio were investigated in cast conditions (T0), after 3 h homogenization at 1100 °C (T1) and after 3 h annealing at 700 °C (T3). When observing the behavior of the different Domains of HEAs as classified by electronic structure it is observed that for the alloys from Domain I which contain fcc structures, the microstructure transforms from multi-to almost single-phase under homogenization (T1). In Domain III alloys containing cubic (bcc and/or B2) structures, very small multi-structural changes are observed. Alloys in Domain II have a mixed structure, i.e. several different structures in the diffraction pattern, which changes during heat treatments.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 Elsevier. |
Keywords: | High entropy alloys; Multicomponent; Structure; Phases; Calorimetry; e/a |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Funding Information: | Funder Grant number European Commission - FP6/FP7 ACCMET - 263206 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 21 May 2020 10:46 |
Last Modified: | 21 May 2020 10:46 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.jallcom.2020.155496 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:161057 |