A Study on the Characteristics of Part-Through Crack Growth of Low-Alloy Steel in Corrosive Environment

Hee Don Jeong, Tetsuo Shoji, Hideaki Takahashi, Kenichi Yamaki

Research output: Contribution to journalArticlepeer-review

Abstract

In order to investigate the characteristics of surface crack growth behavior, the fatigue test and potential measurement using a simulated surface crack specimen for low-alloy steel (STS-42) were achieved in pure water at a temperature of 50°C and an oxygen content of 2 ppm. The potential observed in the surface crack plane showed that the differences depended on the crack depth. With time, the potential around the crack surface showed more noble values than at the deepest tip of crack. This reason could be explained by the difference in oxygen content along the crack plane due to the effect of water flow and crack shape. The mechanism of the generation of the hydrogen-assisted intergranular fracture mode observed at crack surface was also discussed based on an electrochemical aspect.

Original languageEnglish
Pages (from-to)1281-1285
Number of pages5
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume55
Issue number514
DOIs
Publication statusPublished - 1989

Keywords

  • Fracture
  • Hydrogen Embrittlement
  • Intergranular Fracture
  • Low-Alloy Steel
  • Potential Distribution
  • Pure Water
  • Surface Crack

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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