The effect of Nb on the high strain rate hydrogen embrittlement of Q&P steel
Quenching and Partitioning (Q&P) steels are, due to their excellent combination of strength and ductility, seen as good candidates for the third generation advanced high strength steels (AHSS). Although the TRIP effect is beneficial for the overall mechanical behaviour of these steels it potenti...
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2021-01-01
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doaj-726ff32f70474e9795b408d340f430f32021-09-21T15:17:01ZengEDP SciencesEPJ Web of Conferences2100-014X2021-01-012500300710.1051/epjconf/202125003007epjconf_dymat2021_03007The effect of Nb on the high strain rate hydrogen embrittlement of Q&P steelVercruysse Florian0Claeys Lisa1Depover Tom2Verbeken Kim3Verleysen Patricia4Petrov RoumenDepartment of Electromechanical, Systems and Metal Engineering, Ghent UniversityDepartment of Materials, Textiles and Chemical Engineering, Ghent UniversityDepartment of Materials, Textiles and Chemical Engineering, Ghent UniversityDepartment of Materials, Textiles and Chemical Engineering, Ghent UniversityDepartment of Electromechanical, Systems and Metal Engineering, Ghent UniversityQuenching and Partitioning (Q&P) steels are, due to their excellent combination of strength and ductility, seen as good candidates for the third generation advanced high strength steels (AHSS). Although the TRIP effect is beneficial for the overall mechanical behaviour of these steels it potentially can have detrimental effects when strained in a hydrogenenriched environment. The solubility of hydrogen is high in austenite but low in high carbon martensite. Martensite is even in the absence of hydrogen already a possible damage initiation spot. The effect of hydrogen under static and dynamic tensile loading was evaluated in a Q&P and a Nb micro-alloyed Q&P steel. Experiments were carried out under a strain rate ranging from 0.03 s-1 till 500 s-1 and correlated with the hydrogen uptake characterised via thermal desorption spectroscopy (TDS). The presence of Nb resulted in a 25% increase in the hydrogen uptake capacity. A higher susceptibility to hydrogen was observed in the Nb steel partially due to the high hydrogen fraction, but also because of the larger fraction of low stability austenite. However, when tested under dynamic conditions the hydrogen susceptibility is minor and even improved in the micro-alloyed Q&P steel compared to the standard Q&P steel.https://www.epj-conferences.org/articles/epjconf/pdf/2021/04/epjconf_dymat2021_03007.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Vercruysse Florian Claeys Lisa Depover Tom Verbeken Kim Verleysen Patricia Petrov Roumen |
spellingShingle |
Vercruysse Florian Claeys Lisa Depover Tom Verbeken Kim Verleysen Patricia Petrov Roumen The effect of Nb on the high strain rate hydrogen embrittlement of Q&P steel EPJ Web of Conferences |
author_facet |
Vercruysse Florian Claeys Lisa Depover Tom Verbeken Kim Verleysen Patricia Petrov Roumen |
author_sort |
Vercruysse Florian |
title |
The effect of Nb on the high strain rate hydrogen embrittlement of Q&P steel |
title_short |
The effect of Nb on the high strain rate hydrogen embrittlement of Q&P steel |
title_full |
The effect of Nb on the high strain rate hydrogen embrittlement of Q&P steel |
title_fullStr |
The effect of Nb on the high strain rate hydrogen embrittlement of Q&P steel |
title_full_unstemmed |
The effect of Nb on the high strain rate hydrogen embrittlement of Q&P steel |
title_sort |
effect of nb on the high strain rate hydrogen embrittlement of q&p steel |
publisher |
EDP Sciences |
series |
EPJ Web of Conferences |
issn |
2100-014X |
publishDate |
2021-01-01 |
description |
Quenching and Partitioning (Q&P) steels are, due to their excellent combination of strength and ductility, seen as good candidates for the third generation advanced high strength steels (AHSS). Although the TRIP effect is beneficial for the overall mechanical behaviour of these steels it potentially can have detrimental effects when strained in a hydrogenenriched environment. The solubility of hydrogen is high in austenite but low in high carbon martensite. Martensite is even in the absence of hydrogen already a possible damage initiation spot. The effect of hydrogen under static and dynamic tensile loading was evaluated in a Q&P and a Nb micro-alloyed Q&P steel. Experiments were carried out under a strain rate ranging from 0.03 s-1 till 500 s-1 and correlated with the hydrogen uptake characterised via thermal desorption spectroscopy (TDS). The presence of Nb resulted in a 25% increase in the hydrogen uptake capacity. A higher susceptibility to hydrogen was observed in the Nb steel partially due to the high hydrogen fraction, but also because of the larger fraction of low stability austenite. However, when tested under dynamic conditions the hydrogen susceptibility is minor and even improved in the micro-alloyed Q&P steel compared to the standard Q&P steel. |
url |
https://www.epj-conferences.org/articles/epjconf/pdf/2021/04/epjconf_dymat2021_03007.pdf |
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