Hydrogen Embrittlement of Ultra High Strength Low Alloy TRIP-aided Steels

Tomohiko Hojo, Sung Moo Song, Koh Ichi Sugimoto, Akihiko Nagasaka, Shushi Ikeda, Hiroshi Akamizu, Masami Mayuzumi

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The amount of charged hydrogen and its effect on ductility in three kinds of ultra high strength low alloy TRIP-aided steels with different matrix structure were investigated. These TRIP-aided steels, especially the TRIP-aided steels with bainitic ferrite matrix, were charged hydrogen more than the conventional tempered martensitic steel. This was principally associated with retained austenite trapped so much hydrogen in solute. Hydrogen embrittlement was considerably suppressed in the TRIP-aided steels, especially in the TRIP-aided steel with annealed martensite matrix. It was considered that the scanty hydrogen embrittlement of the steel was caused by trapping of much hydrogen into retained austenite, uniform fine structure, TRIP effect of retained austenite and appearance of quasi-dimple fracture.

Original languageEnglish
Pages (from-to)177-182
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume90
Issue number3
DOIs
Publication statusPublished - 2004 Mar

Keywords

  • Hydrogen embrittlement
  • Retained austenite
  • TRIP-aided steel
  • Ultra high strength steel

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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