PSI - Issue 33

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Procedia Structural Integrity 33 (2021) 1215–1218

IGF26 - 26th International Conference on Fracture and Structural Integrity Numerical modeling of hydrogen embrittlement of pearlitic steel in the presence of blunt notches IGF26 - 26th International Conference on Fracture and Structural Integrity Numerical modeling of hydrogen embrittlement of pearlitic steel in the presence of blunt notches

Jesús Toribio *, Beatriz González, Juan-Carlos Matos Fracture & Structural Integrity Research Group (FSIRG), University of Salamanca (USAL) E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain Jesús Toribio *, Beatriz González, Juan-Carlos Matos Fracture & Structural Integrity Research Group (FSIRG), University of al manca (USAL) E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain

Abstract Abstract

© 2021 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 IGF ExCo © 2020 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 European Structural Integrity Society (ESIS) ExCo This paper offers a numerical modeling of hydrogen em rittlement and notch tensile str ngth of high-strength pearlitic steel (suppli d in t e form of hot rolled bars) in the presence of blu t otches, by using the finite element method in order to determine how the notch depth influences the concentration f hydrogen in the steady-state regime for ifferent loading values. Numerical results show that the maximum hydr static stress locati n (towards which hydrogen is directed by a me a ism of stress- ssisted diffusion) shifts from the notch tip to the inner points of the specimen under increasing load, even reaching the sample axis for the most elevated levels of externally applied stress. © 2020 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 European Structural Integrity Society (ESIS) ExCo This paper offers a numerical modeling of hydrogen embrittlement and notch tensile strength of high-strength pearlitic steel (supplied in the form of hot rolled bars) in the presence of blunt notches, by using the finite element method in order to determine how the notch depth influences the concentration of hydrogen in the steady-state regime for different loading values. Numerical results show that the maximum hydrostatic stress location (towards which hydrogen is directed by a mechanism of stress-assisted diffusion) shifts from the notch tip to the inner points of the specimen under increasing load, even reaching the sample axis for the most elevated levels of externally applied stress. Keywords: round notched specimen; numerical modeling; hydrogen diffusion; steady state regime; hydrostatic stress; concentration of hydrogen. Keywords: round notched specimen; numerical modeling; hydrogen diffusion; steady state regime; hydrostatic stress; concentration of hydrogen.

1. Introduction 1. Introduction

Hydrogen embrittlement (HE) is a general phenomenon during which mechanical performance of materials is degraded, so that other names such as hydrogen damage or hydrogen degradation appear as adequate to describe the process, such a denomination being used by the ESIS TC10 Committee on Environmentally Assisted Cracking and Hydrogen Embrittlement (Subcommittee on Hydrogen Degradation). Hydrogen embrittlement (HE) is a general phenomenon during which mechanical performance of materials is degraded, so that other names such as hydrogen damage or hydrogen degradation appear as adequate to describe the process, such a denomination being used by the ESIS TC10 Committee on Environmentally Assisted Cracking and Hydrogen Embrittlement (Subcommittee on Hydrogen Degradation).

* Corresponding author. Tel.: +34-677566723; fax: +34-980545002. E-mail address: toribio@usal.es * Correspon ing author. Tel.: +34-677566723; fax: +34-980545002. E-mail address: toribio@usal.es

2452-3216 © 2021 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 Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo 2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article und r the CC BY-NC-ND licens (https:// reativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo

2452-3216 © 2021 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 IGF ExCo 10.1016/j.prostr.2021.10.138