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The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel

Thomas Simm Orcid Logo, Lin Sun, Deri Galvin, Paul Hill, Martin Rawson, Soran Birosca Orcid Logo, Elliot Gilbert, Harshad Bhadeshia, Karen Perkins Orcid Logo

Materials, Volume: 10, Issue: 12, Start page: 1346

Swansea University Authors: Thomas Simm Orcid Logo, Soran Birosca Orcid Logo, Karen Perkins Orcid Logo

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DOI (Published version): 10.3390/ma10121346

Abstract

Maraging steels gain many of their beneficial properties from heat treatments which induce the precipitation of intermetallic compounds. We consider here a two-stage heat-treatment, first involving austenitisation, followed by quenching to produce martensite and then an ageing treatment at a lower t...

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Published in: Materials
ISSN: 1996-1944
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa37307
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spelling 2018-05-14T11:23:38.1173427 v2 37307 2017-12-02 The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel 10fa7732a6aee5613ff1364dc8460972 0000-0001-6305-9809 Thomas Simm Thomas Simm true false 3445603fcc2ff9d27b476a73b223a507 0000-0002-8380-771X Soran Birosca Soran Birosca true false f866eaa2d8f163d2b4e99259966427c8 0000-0001-5826-9705 Karen Perkins Karen Perkins true false 2017-12-02 EEN Maraging steels gain many of their beneficial properties from heat treatments which induce the precipitation of intermetallic compounds. We consider here a two-stage heat-treatment, first involving austenitisation, followed by quenching to produce martensite and then an ageing treatment at a lower temperature to precipitation harden the martensite of a maraging steel. It is shown that with a suitable choice of the initial austenitisation temperature, the steel can be heat treated to produce enhanced toughness, strength and creep resistance. A combination of small angle neutron scattering, scanning electron microscopy, electron back-scattered diffraction, and atom probe tomography were used to relate the microstructural changes to mechanical properties. It is shown that such a combination of characterisation methods is necessary to quantify this complex alloy, and relate these microstructural changes to mechanical properties. It is concluded that a higher austenitisation temperature leads to a greater volume fraction of smaller Laves phase precipitates formed during ageing, which increase the strength and creep resistance but reduces toughness. Journal Article Materials 10 12 1346 1996-1944 small angle neutron scattering; maraging steel; precipitation strengthening; NiAl; Laves phase; atom probe tomography; creep; strength; ductile to brittle transition temperature 23 11 2017 2017-11-23 10.3390/ma10121346 http://www.mdpi.com/1996-1944/10/12/1346 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University RCUK, EP/H500383/1, EP/H022309/1 2018-05-14T11:23:38.1173427 2017-12-02T20:38:46.4071628 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Thomas Simm 0000-0001-6305-9809 1 Lin Sun 2 Deri Galvin 3 Paul Hill 4 Martin Rawson 5 Soran Birosca 0000-0002-8380-771X 6 Elliot Gilbert 7 Harshad Bhadeshia 8 Karen Perkins 0000-0001-5826-9705 9 0037307-02122017204316.pdf materials-10-01346-v2(1).pdf 2017-12-02T20:43:16.1400000 Output 10495519 application/pdf Version of Record true 2017-12-02T00:00:00.0000000 Released under the terms of a Creative Commons Attribution 4.0 (CC BY) license. true eng
title The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel
spellingShingle The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel
Thomas Simm
Soran Birosca
Karen Perkins
title_short The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel
title_full The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel
title_fullStr The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel
title_full_unstemmed The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel
title_sort The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel
author_id_str_mv 10fa7732a6aee5613ff1364dc8460972
3445603fcc2ff9d27b476a73b223a507
f866eaa2d8f163d2b4e99259966427c8
author_id_fullname_str_mv 10fa7732a6aee5613ff1364dc8460972_***_Thomas Simm
3445603fcc2ff9d27b476a73b223a507_***_Soran Birosca
f866eaa2d8f163d2b4e99259966427c8_***_Karen Perkins
author Thomas Simm
Soran Birosca
Karen Perkins
author2 Thomas Simm
Lin Sun
Deri Galvin
Paul Hill
Martin Rawson
Soran Birosca
Elliot Gilbert
Harshad Bhadeshia
Karen Perkins
format Journal article
container_title Materials
container_volume 10
container_issue 12
container_start_page 1346
publishDate 2017
institution Swansea University
issn 1996-1944
doi_str_mv 10.3390/ma10121346
college_str Faculty of Science and Engineering
hierarchytype
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
url http://www.mdpi.com/1996-1944/10/12/1346
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description Maraging steels gain many of their beneficial properties from heat treatments which induce the precipitation of intermetallic compounds. We consider here a two-stage heat-treatment, first involving austenitisation, followed by quenching to produce martensite and then an ageing treatment at a lower temperature to precipitation harden the martensite of a maraging steel. It is shown that with a suitable choice of the initial austenitisation temperature, the steel can be heat treated to produce enhanced toughness, strength and creep resistance. A combination of small angle neutron scattering, scanning electron microscopy, electron back-scattered diffraction, and atom probe tomography were used to relate the microstructural changes to mechanical properties. It is shown that such a combination of characterisation methods is necessary to quantify this complex alloy, and relate these microstructural changes to mechanical properties. It is concluded that a higher austenitisation temperature leads to a greater volume fraction of smaller Laves phase precipitates formed during ageing, which increase the strength and creep resistance but reduces toughness.
published_date 2017-11-23T03:46:58Z
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