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The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel / Thomas Simm; Lin Sun; Deri Galvin; Paul Hill; Martin Rawson; Soran Birosca; Elliot Gilbert; Harshad Bhadeshia; Karen Perkins

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

Swansea University Author: Birosca, Soran

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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/cronfa37334
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spelling 2017-12-06T12:29:42Z v2 37334 2017-12-06 The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel Soran Birosca Soran Birosca true 0000-0002-8380-771X false 3445603fcc2ff9d27b476a73b223a507 df87e3ea445c9a43f64225ecdd5e01f6 rn1aThylAFjAhZOiyJZYgAgr5y2nBRz3haj4DmVVDsQ= 2017-12-06 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 0 0 2017 2017-01-01 10.3390/ma10121346 College of Engineering Engineering CENG EEN None None 2017-12-06T12:29:42Z 2017-12-06T12:23:40Z College of Engineering Engineering Thomas Simm 1 Lin Sun 2 Deri Galvin 3 Paul Hill 4 Martin Rawson 5 Soran Birosca 6 Elliot Gilbert 7 Harshad Bhadeshia 8 Karen Perkins 9 0037334-06122017122552.pdf simm2017(4).pdf 2017-12-06T12:25:52Z Output 10616956 application/pdf VoR true Published to Cronfa 06/12/2017 2017-12-06T00:00:00 false 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
Birosca, Soran
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 3445603fcc2ff9d27b476a73b223a507
author_id_fullname_str_mv 3445603fcc2ff9d27b476a73b223a507_***_Birosca, Soran
author Birosca, Soran
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 College of Engineering
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hierarchy_top_id collegeofengineering
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 1
active_str 1
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 2017-01-01T04:58:37Z
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