Effect of grain size on transformation-induced plasticity in an ultrafine-grained metastable austenitic steel

Chan Soo Yoo, Yong Min Park, Yeon Seung Jung, Young Kook Lee

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

The stress-strain curves and temperature change of ultrafine-grained (UFG) austenitic steels with different grain sizes were measured during uniaxial tensile testing. The uniform stress-strain and temperature change curves are divided into three different regions depending on the hardening mechanisms. The strain-induced martensite in the UFG steels provides extra-strain hardening, large ductility and slower temperature increase. The critical stored energy for the formation of the strain-induced martensite is measured as a function of austenite grain size.

Original languageEnglish
Pages (from-to)71-74
Number of pages4
JournalScripta Materialia
Volume59
Issue number1
DOIs
Publication statusPublished - 2008 Jul

Bibliographical note

Funding Information:
This work was supported by the Agency for Defense Development under the Contract UD060017AD and by the National Core Research Center Program from MOST and KOSEF (R15-2006-022-01002-0).

All Science Journal Classification (ASJC) codes

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

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