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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

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

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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 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 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised 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 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 Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
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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 2020-10-05T04:07:34Z
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