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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

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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...

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Published in: Journal of Alloys and Compounds
ISSN: 0925-8388
Published: Elsevier BV 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa54200
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spelling 2021-03-02T15:40:31.2598690 v2 54200 2020-05-11 Structural investigation of the stability in temperature of some high entropy / multi major components alloys as a function of their electronic structure 674cb9201fd56da571c3e56d6d1ab107 0000-0003-3537-0661 Monique Calvo-Dahlborg Monique Calvo-Dahlborg true false d6ee86188f27782544b143b1356ac4a8 Ulf Dahlborg Ulf Dahlborg true false c7e4a4152b2cf403da129be7d1c2904d Shahin Mehraban Shahin Mehraban true false 9f102ff59824fd4f7ce3d40144304395 0000-0003-0953-5936 Nicholas Lavery Nicholas Lavery true false 07a865adc76376646bc6c03a69ce35a9 0000-0002-0570-3018 Steve Brown Steve Brown true false 2020-05-11 FGSEN 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. Journal Article Journal of Alloys and Compounds 837 155496 Elsevier BV 0925-8388 High entropy alloys, Multicomponent, Structure, Phases, Calorimetry, e/a 5 10 2020 2020-10-05 10.1016/j.jallcom.2020.155496 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2021-03-02T15:40:31.2598690 2020-05-11T13:29:10.8782900 College of Engineering Engineering Monique Calvo-Dahlborg 0000-0003-3537-0661 1 Ulf Dahlborg 2 J. Cornide 3 Shahin Mehraban 4 Z. Leong 5 T.C. Hansen 6 R.K. Wunderlich 7 R. Goodall 8 Nicholas Lavery 0000-0003-0953-5936 9 Steve Brown 0000-0002-0570-3018 10
title Structural investigation of the stability in temperature of some high entropy / multi major components alloys as a function of their electronic structure
spellingShingle 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
Ulf Dahlborg
Shahin Mehraban
Nicholas Lavery
Steve Brown
title_short Structural investigation of the stability in temperature of some high entropy / multi major components alloys as a function of their electronic structure
title_full Structural investigation of the stability in temperature of some high entropy / multi major components alloys as a function of their electronic structure
title_fullStr Structural investigation of the stability in temperature of some high entropy / multi major components alloys as a function of their electronic structure
title_full_unstemmed Structural investigation of the stability in temperature of some high entropy / multi major components alloys as a function of their electronic structure
title_sort Structural investigation of the stability in temperature of some high entropy / multi major components alloys as a function of their electronic structure
author_id_str_mv 674cb9201fd56da571c3e56d6d1ab107
d6ee86188f27782544b143b1356ac4a8
c7e4a4152b2cf403da129be7d1c2904d
9f102ff59824fd4f7ce3d40144304395
07a865adc76376646bc6c03a69ce35a9
author_id_fullname_str_mv 674cb9201fd56da571c3e56d6d1ab107_***_Monique Calvo-Dahlborg
d6ee86188f27782544b143b1356ac4a8_***_Ulf Dahlborg
c7e4a4152b2cf403da129be7d1c2904d_***_Shahin Mehraban
9f102ff59824fd4f7ce3d40144304395_***_Nicholas Lavery
07a865adc76376646bc6c03a69ce35a9_***_Steve Brown
author Monique Calvo-Dahlborg
Ulf Dahlborg
Shahin Mehraban
Nicholas Lavery
Steve Brown
author2 Monique Calvo-Dahlborg
Ulf Dahlborg
J. Cornide
Shahin Mehraban
Z. Leong
T.C. Hansen
R.K. Wunderlich
R. Goodall
Nicholas Lavery
Steve Brown
format Journal article
container_title Journal of Alloys and Compounds
container_volume 837
container_start_page 155496
publishDate 2020
institution Swansea University
issn 0925-8388
doi_str_mv 10.1016/j.jallcom.2020.155496
publisher Elsevier BV
college_str College of Engineering
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hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
document_store_str 0
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description 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.
published_date 2020-10-05T04:08:43Z
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