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Novel stress corrosion testing method for high‐strength steels
Author(s) -
Latypova Renata,
Kauppi Timo,
Mehtonen Saara,
Hänninen Hannu,
Porter David,
Kömi Jukka
Publication year - 2019
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201810462
Subject(s) - materials science , cathodic protection , stress corrosion cracking , stress (linguistics) , corrosion , ultimate tensile strength , metallurgy , hydrogen embrittlement , martensite , displacement (psychology) , finite element method , tensile testing , structural engineering , composite material , electrochemistry , engineering , microstructure , psychology , linguistics , chemistry , philosophy , electrode , psychotherapist
This paper presents a novel TFT (tuning fork test) stress corrosion testing method, which was developed for classifying martensitic high‐strength steels. The novel method was developed by applying finite element calculations to optimize a tuning fork geometry to enable accurate stress adjustment with simple inexpensive equipment. Different steels were exposed to cathodic hydrogen charging conditions with various elastic tensile stress levels that were achieved by displacement control. All steels exhibited hydrogen‐induced stress corrosion cracking after exceeding a material‐specific threshold stress level that decreased linearly with increasing hardness.