Heterogeneous nanostructure developed in heavily cold-rolled stainless steels and the specific mechanical properties

H. Miura, M. Kobayashi, Y. Todaka, C. Watanabe, Y. Aoyagi, N. Sugiura, N. Yoshinaga

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Stainless steels were cold rolled to 92% reduction. The microstructure developed in a stable austenitic stainless steel was complicated heterogeneous nanostructure composed of lamellar-twin domains, shear bands and low-angle lamellar boundaries. Cold-rolled duplex stainless steel, however, exhibited more complicated and mixed microstructure where ferritic lamellar and the heterogeneous nanostructure of austenite were alternatively stacked. The heavily cold-rolled stainless steels followed by ageing exhibited marvelous high tensile strength over 2.6 GPa perpendicular to the rolling direction, although around 2 GPa along the rolling direction. Even while such high strength, moderate plastic elongation over 5% was attained.

Original languageEnglish
Pages (from-to)33-36
Number of pages4
JournalScripta Materialia
Volume133
DOIs
Publication statusPublished - 2017 May 1

Keywords

  • Heterogeneous nanostructure
  • Mechanical property
  • Rolling
  • Twin
  • Ultrafine grain

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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