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The Influence of Lath, Block and Prior Austenite Grain (PAG) Size on the Tensile, Creep and Fatigue Properties of Novel Maraging Steel

Thomas Simm Orcid Logo, Lin Sun, Steven McAdam, Paul Hill, Martin Rawson, Karen Perkins Orcid Logo

Materials, Volume: 10, Issue: 7, Start page: 730

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

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DOI (Published version): 10.3390/ma10070730

Abstract

The influence of martensitic microstructure and prior austenite grain (PAG) size on the mechanical properties of novel maraging steel was studied. This was achieved by looking at two different martensitic structures with PAG sizes of approximately 40 µm and 80 µm, produced by hot rolling to differen...

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Published in: Materials
ISSN: 1996-1944
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa34628
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spelling 2017-09-11T12:46:28.6854009 v2 34628 2017-07-13 The Influence of Lath, Block and Prior Austenite Grain (PAG) Size on the Tensile, Creep and Fatigue Properties of Novel Maraging Steel 10fa7732a6aee5613ff1364dc8460972 0000-0001-6305-9809 Thomas Simm Thomas Simm true false f866eaa2d8f163d2b4e99259966427c8 0000-0001-5826-9705 Karen Perkins Karen Perkins true false 2017-07-13 EEN The influence of martensitic microstructure and prior austenite grain (PAG) size on the mechanical properties of novel maraging steel was studied. This was achieved by looking at two different martensitic structures with PAG sizes of approximately 40 µm and 80 µm, produced by hot rolling to different reductions. Two ageing heat-treatments were considered: both heat-treatments consisted of austenisation at 960 °C, then aging at 560 °C for 5 h, but while one was rapidly cooled the other was slow cooled and then extended aged at 480 °C for 64 h. It is shown that for the shorter ageing treatment the smaller PAG size resulted in significant improvements in strength (increase of more than 150 MPa), ductility (four times increase), creep life (almost four times increase in creep life) and fatigue life (almost doubled). Whereas, the extended aged sample showed similar changes in the fatigue life, elongation and hardness it displayed yet showed no difference in tensile strength and creep. These results display the complexity of microstructural contributions to mechanical properties in maraging steels. Journal Article Materials 10 7 730 1996-1944 creep; strength; ductility; fatigue; martensite; electron back-scatter diffraction (EBSD); maraging steel 30 6 2017 2017-06-30 10.3390/ma10070730 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2017-09-11T12:46:28.6854009 2017-07-13T08:12:00.0108402 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Thomas Simm 0000-0001-6305-9809 1 Lin Sun 2 Steven McAdam 3 Paul Hill 4 Martin Rawson 5 Karen Perkins 0000-0001-5826-9705 6 0034628-13072017081522.pdf simm2017(2).pdf 2017-07-13T08:15:22.2200000 Output 14199864 application/pdf Version of Record true 2017-07-13T00:00:00.0000000 true eng
title The Influence of Lath, Block and Prior Austenite Grain (PAG) Size on the Tensile, Creep and Fatigue Properties of Novel Maraging Steel
spellingShingle The Influence of Lath, Block and Prior Austenite Grain (PAG) Size on the Tensile, Creep and Fatigue Properties of Novel Maraging Steel
Thomas Simm
Karen Perkins
title_short The Influence of Lath, Block and Prior Austenite Grain (PAG) Size on the Tensile, Creep and Fatigue Properties of Novel Maraging Steel
title_full The Influence of Lath, Block and Prior Austenite Grain (PAG) Size on the Tensile, Creep and Fatigue Properties of Novel Maraging Steel
title_fullStr The Influence of Lath, Block and Prior Austenite Grain (PAG) Size on the Tensile, Creep and Fatigue Properties of Novel Maraging Steel
title_full_unstemmed The Influence of Lath, Block and Prior Austenite Grain (PAG) Size on the Tensile, Creep and Fatigue Properties of Novel Maraging Steel
title_sort The Influence of Lath, Block and Prior Austenite Grain (PAG) Size on the Tensile, Creep and Fatigue Properties of Novel Maraging Steel
author_id_str_mv 10fa7732a6aee5613ff1364dc8460972
f866eaa2d8f163d2b4e99259966427c8
author_id_fullname_str_mv 10fa7732a6aee5613ff1364dc8460972_***_Thomas Simm
f866eaa2d8f163d2b4e99259966427c8_***_Karen Perkins
author Thomas Simm
Karen Perkins
author2 Thomas Simm
Lin Sun
Steven McAdam
Paul Hill
Martin Rawson
Karen Perkins
format Journal article
container_title Materials
container_volume 10
container_issue 7
container_start_page 730
publishDate 2017
institution Swansea University
issn 1996-1944
doi_str_mv 10.3390/ma10070730
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
document_store_str 1
active_str 0
description The influence of martensitic microstructure and prior austenite grain (PAG) size on the mechanical properties of novel maraging steel was studied. This was achieved by looking at two different martensitic structures with PAG sizes of approximately 40 µm and 80 µm, produced by hot rolling to different reductions. Two ageing heat-treatments were considered: both heat-treatments consisted of austenisation at 960 °C, then aging at 560 °C for 5 h, but while one was rapidly cooled the other was slow cooled and then extended aged at 480 °C for 64 h. It is shown that for the shorter ageing treatment the smaller PAG size resulted in significant improvements in strength (increase of more than 150 MPa), ductility (four times increase), creep life (almost four times increase in creep life) and fatigue life (almost doubled). Whereas, the extended aged sample showed similar changes in the fatigue life, elongation and hardness it displayed yet showed no difference in tensile strength and creep. These results display the complexity of microstructural contributions to mechanical properties in maraging steels.
published_date 2017-06-30T03:42:58Z
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score 11.012678

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