In situ TEM observation on martensitic transformation during tensile deformation of SUS304 metastable austenitic stainless steel

Xi Feng Li, Wei Ding, Jian Cao, Li Yan Ye, Jun Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Through in situ transmission electron microscopy observation on SUS304 metastable austenitic stainless steel during stretching at room temperature, it is found that ε martensite plates were induced preferentially from the sites of dislocation pile-ups. With increasing deformation, some of ε thin martensite platelets disappear and reversibly transform to γ austenite without heating treatment, which is different from the previous result that ε martensite can entirely transform to α' martensite. Then, some of deformation twins appear and grow along the vertical direction of ε martensite due to(111) (101¯0)ε. Moreover, it is directly observed that multiple transformation mechanisms via y→ ε → γ, γ → ε, γ → α', γ→ ε → α', γ → deformation twins → α' can co-exist.

Original languageEnglish (US)
Pages (from-to)302-306
Number of pages5
JournalActa Metallurgica Sinica (English Letters)
Volume28
Issue number3
DOIs
StatePublished - Mar 1 2015

Keywords

  • Deformation twin
  • In situ TEM
  • Martensitic transformation
  • SUS304 stainless steel
  • ε Martensite

ASJC Scopus subject areas

  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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