PSI - Issue 54

ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 54 (2024) 180–187

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the ICSI 2023 organizers Abstract This study evaluates hydrogen absorption and trapping at vanadium carbides from a low H 2 partial pressure atmosphere at elevated temperatures. A generic Fe-C-V steel is subjected to a quench and temper treatment, with tempering in a dilute hydrogen gas atmosphere. The trapping ability of the different carbide types is analyzed by thermal desorption spectroscopy and hot extraction together with detailed microstructural analysis. No hydrogen absorption during tempering could be observed for Fe-C V alloy austenitized at 1250°C. Hence, precipitated VC cannot trap hydrogen at elevated temperatures. Contrary, limited weakly trapped hydrogen is introduced for the alloy containing undissolved carbides. © 2023 The Authors, Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the ICSI 2023 organizers Keywords: thermal desorption spectroscopy; hydrogen trapping; carbides; gaseous charging 1. Introduction Hydrogen (H) introduction in steel may occur during service, typically at temperatures close to room temperature, but also during various production steps, at elevated temperatures, considerable H uptake may occur. The presence of H in steels may cause unexpected failure due to a deterioration of the mechanical properties, a phenomenon known as hydrogen embrittlement (HE). Introducing carbides in a steel microstructure has been proposed as an interesting strategy to improve the resistance against HE while maintaining a sufficiently high strength level. International Conference on Structural Integrity 2023 (ICSI 2023) Study of hydrogen trapping at carbides after gaseous charging at elevated temperatures Liese Vandewalle a , Tom Depover a *, Kim Verbeken a † a Ghent University(UGent), Department of Materials, Textiles and Chemical Engineering, Sustainable Materials Science, Tech Lane Ghent Science Park 46, B-9000 Ghent, Belgium Abstract This study evaluates hydrogen absorption and trapping at vanadium carbides from a low H 2 partial pressure atmosphere at elevated temperatures. A generic Fe-C-V steel is subjected to a quench and temper treatment, with tempering in a dilute hydrogen gas atmosphere. The trapping ability of the different carbide types is analyzed by thermal desorption spectroscopy and hot extraction together with detailed microstructural analysis. No hydrogen absorption during tempering could be observed for Fe-C V alloy austenitized at 1250°C. Hence, precipitated VC cannot trap hydrogen at elevated temperatures. Contrary, limited weakly trapped hydrogen is introduced for the alloy containing undissolved carbides. © 2023 The Authors, Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the ICSI 2023 organizers Keywords: thermal desorption spectroscopy; hydrogen trapping; carbides; gaseous charging 1. Introduction Hydrogen (H) introduction in steel may occur during service, typically at temperatures close to room temperature, but also during various production steps, at elevated temperatures, considerable H uptake may occur. The presence of H in steels may cause unexpected failure due to a deterioration of the mechanical properties, a phenomenon known as hydrogen embrittlement (HE). Introducing carbides in a steel microstructure has been proposed as an interesting strategy to improve the resistance against HE while maintaining a sufficiently high strength level. International Conference on Structural Integrity 2023 (ICSI 2023) Study of hydrogen trapping at carbides after gaseous charging at elevated temperatures Liese Vandewalle a , Tom Depover a *, Kim Verbeken a † a Ghent University(UGent), Department of Materials, Textiles and Chemical Engineering, Sustainable Materials Science, Tech Lane Ghent Science Park 46, B-9000 Ghent, Belgium

* Corresponding author. Tel.: +329-331-04-33. E-mail address: Tom.Depover@UGent.be † Corresponding author. Tel.: +329-331-04-33. +329-331-04-53. E-mail address: Tom.Depover@UGent.be; Kim.Verbeken@UGent.be * Corresponding author. Tel.: +329-331-04-33. E-mail address: Tom.Depover@UGent.be † Corresponding author. Tel.: +329-331-04-33. +329-331-04-53. E-mail address: Tom.Depover@UGent.be; Kim.Verbeken@UGent.be

2452-3216 © 2023 The Authors, Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the ICSI 2023 organizers 2452-3216 © 2023 The Authors, Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the ICSI 2023 organizers

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the ICSI 2023 organizers 10.1016/j.prostr.2024.01.071