Fatigue fracture of duplex stainless steel with heterogeneous nanostructure by heavy cold rolling

Yoshikazu Yamazaki, Masakazu Kobayashi, Yoshikazu Todaka, Chihiro Watanabe, Yoshiteru Aoyagi, Hiromi Miura

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Synopsis: Fatigue behaviors of duplex stainless steels with excellent tensile properties brought by heterogeneous nanostructure were examined with changing volume fraction of ferritic-austenitic phases. In as-rolled samples, fatigue strength taken by 10 7 cycles became double comparing with those of conventional stainless steels. The volume fraction of ferritic-austenitic phases has not affected fatigue behavior. Further, the fatigue strength was improved additionally 200 MPa by aging heat-treatment after cold rolling. The duplex stainless steels with heterogeneous nanostructure possessed enough fatigue strength even in 3%NaCl solution though its fatigue strength declined.

Original languageEnglish
Pages (from-to)150-159
Number of pages10
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume105
Issue number2
DOIs
Publication statusPublished - 2019 Feb

Keywords

  • Duplex stainless steels
  • Fatigue
  • Fracture
  • Heavy cold rolling
  • Heterogeneous nanostructure
  • High strength

ASJC Scopus subject areas

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

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