University of Oulu

Latypova, R, Nyo, TT, Kauppi, T, et al. Hydrogen‐induced stress corrosion cracking studied by the novel tuning‐fork test method. Materials and Corrosion. 2020; 71: 1629– 1636.

Hydrogen‐induced stress corrosion cracking studied by the novel tuning‐fork test method

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Author: Latypova, Renata1; Nyo, Tun Tun1; Kauppi, Timo1,2;
Organizations: 1Materials and Mechanical Engineering, Centre for Advanced Steels Research (CASR), University of Oulu, Oulu, Finland
2Arctic Steel and Mining RDI Group, Lapland University of Applied Science, Kemi, Finland
3SSAB, Raahe, Finland
4Department of Mechanical Engineering, Aalto University School of Engineering, Espoo, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.5 MB)
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Language: English
Published: John Wiley & Sons, 2020
Publish Date: 2020-11-09


A novel tuning‐fork test method was developed to study hydrogen‐induced stress corrosion cracking of high‐strength steels. Special tuning‐fork specimens are designed to enable accurate stress adjustment via constant displacement under cathodic hydrogen charging conditions. In this study, the testing method is further developed, making the potentiostatic hydrogen charging possible through the modifications of the corrosion cell. Different direct‐quenched, low‐ and medium‐carbon steel grades, with a hardness range of 300–550 HBW, are investigated with both galvanostatic and potentiostatic hydrogen charging techniques. For each steel grade, the lowest fracture stress and highest no‐fracture stress are determined. Both hydrogen charging techniques produce similar results, and it is observed that the fracture stress decreases with the increase in hardness. However, the potentiostatic technique produces larger differences between the lowest fracture stress results, thus having a better resolution.

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Series: Materials and corrosion
ISSN: 0947-5117
ISSN-E: 1521-4176
ISSN-L: 0947-5117
Volume: 71
Issue: 10
Pages: 1629 - 1636
DOI: 10.1002/maco.202011767
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: Sakari Pallaspuro acknowledges Academy of Finland (#311934) for funding. This study was supported by Business Finland Oy.
Copyright information: © 2020 The Authors. Materials and Corrosion published by Wiley‐VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.