No Cover Image

Journal article 332 views

Structural investigation of the stability in temperature of some high entropy / multi major components alloys as a function of their electronic structure

Monique Calvo-Dahlborg Orcid Logo, Ulf Dahlborg, J. Cornide, Shahin Mehraban, Z. Leong, T.C. Hansen, R.K. Wunderlich, R. Goodall, Nicholas Lavery Orcid Logo, Steve Brown Orcid Logo

Journal of Alloys and Compounds, Volume: 837, Start page: 155496

Swansea University Authors: Monique Calvo-Dahlborg Orcid Logo, Ulf Dahlborg, Shahin Mehraban, Nicholas Lavery Orcid Logo, Steve Brown Orcid Logo

Full text not available from this repository: check for access using links below.

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...

Full description

Published in: Journal of Alloys and Compounds
ISSN: 0925-8388
Published: Elsevier BV 2020
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa54200
Tags: Add Tag
No Tags, Be the first to tag this record!
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.
Keywords: High entropy alloys, Multicomponent, Structure, Phases, Calorimetry, e/a
College: College of Engineering
Start Page: 155496