Novel stress corrosion testing method for high-strength steels

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Renata Latypova
  • Timo Kauppi
  • Saara Mehtonen
  • Hannu Hänninen

  • David Porter
  • Jukka Komi

Research units

  • SSAB
  • University of Oulu
  • Lapland University of Applied Science

Abstract

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.

Details

Original languageEnglish
Pages (from-to)521-528
Number of pages8
JournalMATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
Volume70
Issue number3
Publication statusPublished - 1 Mar 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • high-strength steel, hydrogen embrittlement, pitting corrosion, stress corrosion cracking, HYDROGEN EMBRITTLEMENT, CRACKING, DAMAGE

ID: 32482265