Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics

Zarinejad, Mehrdad; Wada, Kiyo; Pahlevani, Farshid; Katal, Reza; Rimaz, Sajjad

doi:10.1016/j.jallcom.2021.159399

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Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics

Mehrdad Zarinejad, Kiyo Wada, Farshid Pahlevani, Reza Katal, Sajjad Rimaz

Journal of Alloys and Compounds, Volume: 870, Start page: 159399

Swansea University Author: Kiyo Wada

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DOI (Published version): 10.1016/j.jallcom.2021.159399

Abstract

Dependence of transformation temperatures of TiAu- and TiIr-based Intermetallics on Valence Electron Ratio (VER), number of valence electrons (ev) and average atomic number of the alloys (Z) were investigated. The alloys mostly have medium numbers of valence electrons (6.5 ≤ ev ≤ 7.3) near 7 with a...

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Published in:	Journal of Alloys and Compounds
ISSN:	0925-8388
Published:	Elsevier BV 2021
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa56459
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first_indexed	2021-03-18T09:21:48Z
last_indexed	2021-04-13T03:24:04Z
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spelling	2021-04-12T12:33:34.6956672 v2 56459 2021-03-18 Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics 15e59ea2d2602d5c6319b5e5c446d5a7 Kiyo Wada Kiyo Wada true false 2021-03-18 AERO Dependence of transformation temperatures of TiAu- and TiIr-based Intermetallics on Valence Electron Ratio (VER), number of valence electrons (ev) and average atomic number of the alloys (Z) were investigated. The alloys mostly have medium numbers of valence electrons (6.5 ≤ ev ≤ 7.3) near 7 with a limited number of TiAu-based alloys belonging to high valence electron group with ev more than 7.50 and relatively narrow range of average atomic numbers (Z = 41–53). The forward and reverse phase transformation temperatures, Ms and As of AuTi-based alloys sharply increase with the average atomic number of the alloys. The investigated TiIr alloy compositions have almost similar average atomic numbers (49.5–50.2). Clear correlations between transformation temperatures and VER were found. Ms and As both decrease from around 1550 °C to as low as 17 °C respectively, with increasing VER from 0.131 to 0. 174. The dependence of transformation temperatures on valence electron ratio is discussed based on the variations of elastic properties and atomic bonding due to composition change in these alloys. Journal Article Journal of Alloys and Compounds 870 159399 Elsevier BV 0925-8388 Valence electron, Transformation temperature, Martensite, Shape memory alloy, TiAu, TiIr, Metals and alloys, Intermetallics-Phase transition 25 7 2021 2021-07-25 10.1016/j.jallcom.2021.159399 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University 2021-04-12T12:33:34.6956672 2021-03-18T09:18:24.7831068 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering Mehrdad Zarinejad 1 Kiyo Wada 2 Farshid Pahlevani 3 Reza Katal 4 Sajjad Rimaz 5 56459__19508__3ea6c275ac8e4452b3fe21856dbedfa1.pdf 56459.pdf 2021-03-19T10:22:10.1938876 Output 448449 application/pdf Accepted Manuscript true 2022-03-05T00:00:00.0000000 ©2021 All rights reserved. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND) true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title	Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics
spellingShingle	Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics Kiyo Wada
title_short	Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics
title_full	Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics
title_fullStr	Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics
title_full_unstemmed	Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics
title_sort	Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics
author_id_str_mv	15e59ea2d2602d5c6319b5e5c446d5a7
author_id_fullname_str_mv	15e59ea2d2602d5c6319b5e5c446d5a7_***_Kiyo Wada
author	Kiyo Wada
author2	Mehrdad Zarinejad Kiyo Wada Farshid Pahlevani Reza Katal Sajjad Rimaz
format	Journal article
container_title	Journal of Alloys and Compounds
container_volume	870
container_start_page	159399
publishDate	2021
institution	Swansea University
issn	0925-8388
doi_str_mv	10.1016/j.jallcom.2021.159399
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 Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering
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description	Dependence of transformation temperatures of TiAu- and TiIr-based Intermetallics on Valence Electron Ratio (VER), number of valence electrons (ev) and average atomic number of the alloys (Z) were investigated. The alloys mostly have medium numbers of valence electrons (6.5 ≤ ev ≤ 7.3) near 7 with a limited number of TiAu-based alloys belonging to high valence electron group with ev more than 7.50 and relatively narrow range of average atomic numbers (Z = 41–53). The forward and reverse phase transformation temperatures, Ms and As of AuTi-based alloys sharply increase with the average atomic number of the alloys. The investigated TiIr alloy compositions have almost similar average atomic numbers (49.5–50.2). Clear correlations between transformation temperatures and VER were found. Ms and As both decrease from around 1550 °C to as low as 17 °C respectively, with increasing VER from 0.131 to 0. 174. The dependence of transformation temperatures on valence electron ratio is discussed based on the variations of elastic properties and atomic bonding due to composition change in these alloys.
published_date	2021-07-25T04:11:26Z
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score	11.012723

Martensite and reverse transformation temperatures of TiAu-based and TiIr-based intermetallics

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