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Dynamic Tensile Testing of Ultrahigh Strength Hot Stamped Martensitic Steels

Tom Taylor, George Fourlaris, Stephen Danks

steel research international, Volume: 88, Issue: 3, Start page: 1600144

Swansea University Author: George Fourlaris

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DOI (Published version): 10.1002/srin.201600144

Abstract

Tensile testing over strain rates of 0.001, 1, 100, and 200 s−1 is performed on three novel ultrahigh strength hot stamped martensitic steels, namely 38MnB5, 15MnCr5, and 25MnVB5, in addition to the conventional “boron steel” for automotive hot stamping technologies, 22MnB5. Each steel generally dem...

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Published in: steel research international
ISSN: 1611-3683
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa28860
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first_indexed 2016-06-14T12:24:55Z
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spelling 2020-07-20T10:24:45.5023342 v2 28860 2016-06-14 Dynamic Tensile Testing of Ultrahigh Strength Hot Stamped Martensitic Steels 8657854c891dd0c822008ce70ef35b6c George Fourlaris George Fourlaris true false 2016-06-14 EEN Tensile testing over strain rates of 0.001, 1, 100, and 200 s−1 is performed on three novel ultrahigh strength hot stamped martensitic steels, namely 38MnB5, 15MnCr5, and 25MnVB5, in addition to the conventional “boron steel” for automotive hot stamping technologies, 22MnB5. Each steel generally demonstrates positive strain rate sensitivity (increasing tensile strength) with increasing strain rate from 0.001 to 1 s−1, but negative strain rate sensitivity (decreasing tensile strength) with increasing strain rate from 1 to 200 s−1. The notable exception to the above is 38MnB5, which demonstrates consistently increasing ultimate tensile strength across all four strain rates. Moreover, each steel generally demonstrates maximum elongation at strain rates of 100 or 200 s−1. The response of 38MnB5 to increasing strain rate gives rise to significantly higher modulus of toughness (energy absorption) compared to 22MnB5 at the higher strain rates. It is concluded that 38MnB5 should provide superior “anti-intrusive” crash performance under low-speed impact owing to significantly higher tensile strength, yet superior “impact energy absorptive” crash performance under high-speed impact owing to significantly higher modulus of toughness. Journal Article steel research international 88 3 1600144 1611-3683 31 12 2017 2017-12-31 10.1002/srin.201600144 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2020-07-20T10:24:45.5023342 2016-06-14T10:16:29.6241514 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Tom Taylor 1 George Fourlaris 2 Stephen Danks 3 0028860-14062016104815.pdf GF3.pdf 2016-06-14T10:48:15.2230000 Output 1084368 application/pdf Accepted Manuscript true 2017-06-22T00:00:00.0000000 true
title Dynamic Tensile Testing of Ultrahigh Strength Hot Stamped Martensitic Steels
spellingShingle Dynamic Tensile Testing of Ultrahigh Strength Hot Stamped Martensitic Steels
George Fourlaris
title_short Dynamic Tensile Testing of Ultrahigh Strength Hot Stamped Martensitic Steels
title_full Dynamic Tensile Testing of Ultrahigh Strength Hot Stamped Martensitic Steels
title_fullStr Dynamic Tensile Testing of Ultrahigh Strength Hot Stamped Martensitic Steels
title_full_unstemmed Dynamic Tensile Testing of Ultrahigh Strength Hot Stamped Martensitic Steels
title_sort Dynamic Tensile Testing of Ultrahigh Strength Hot Stamped Martensitic Steels
author_id_str_mv 8657854c891dd0c822008ce70ef35b6c
author_id_fullname_str_mv 8657854c891dd0c822008ce70ef35b6c_***_George Fourlaris
author George Fourlaris
author2 Tom Taylor
George Fourlaris
Stephen Danks
format Journal article
container_title steel research international
container_volume 88
container_issue 3
container_start_page 1600144
publishDate 2017
institution Swansea University
issn 1611-3683
doi_str_mv 10.1002/srin.201600144
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 Tensile testing over strain rates of 0.001, 1, 100, and 200 s−1 is performed on three novel ultrahigh strength hot stamped martensitic steels, namely 38MnB5, 15MnCr5, and 25MnVB5, in addition to the conventional “boron steel” for automotive hot stamping technologies, 22MnB5. Each steel generally demonstrates positive strain rate sensitivity (increasing tensile strength) with increasing strain rate from 0.001 to 1 s−1, but negative strain rate sensitivity (decreasing tensile strength) with increasing strain rate from 1 to 200 s−1. The notable exception to the above is 38MnB5, which demonstrates consistently increasing ultimate tensile strength across all four strain rates. Moreover, each steel generally demonstrates maximum elongation at strain rates of 100 or 200 s−1. The response of 38MnB5 to increasing strain rate gives rise to significantly higher modulus of toughness (energy absorption) compared to 22MnB5 at the higher strain rates. It is concluded that 38MnB5 should provide superior “anti-intrusive” crash performance under low-speed impact owing to significantly higher tensile strength, yet superior “impact energy absorptive” crash performance under high-speed impact owing to significantly higher modulus of toughness.
published_date 2017-12-31T03:35:13Z
_version_ 1763751508315209728
score 11.036531

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