Influences of heterogeneous nano-structure developed in heavily cold-rolled austenitic stain-less steel on texture and ductility

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

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

SUS316LN austenitic stainless steel was simply and heavily cold-rolled up to 92% reduction in thickness. The microstructure developed was composed of complicated heterogeneous nano-structure; "eye-shaped" twin domains, which were surrounded by shear bands, were embedded in low-angle lamellar boundaries. The cold-rolled austenitic steel exhibited marvelous high strength of 1.95 GPa when tensile tested normal to the rolling direction, while lower strength of 1.57 GPa along the rolling direction. Mod-erate ductility around 10 % was still retained in spite of the high strength. The superior mechanical properties of the heavily cold-rolled austenitic stainless steel would be attributed to complicated heterogeneous nano-structures. These achieved strengths were comparable with those obtained by methods of severe plastic deformation. ? 2017 The Japan Institute of Metals and Materials.

Original languageEnglish
Pages (from-to)536-541
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume81
Issue number12
DOIs
Publication statusPublished - 2017

Keywords

  • Heterogeneous microstructure
  • Mechanical property
  • Rolling
  • Stainless steel
  • Texture
  • Twin

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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