Effect of thermomechanical processing on the microstructure and retained austenite stability during in situ tensile testing using synchrotron X-Ray diffraction of NbMoAl TRIP steel

Elena V. Pereloma*, Lai Chang Zhang, Klaus Dieter Liss, Ulf Garbe, Jonathan Almer, Thomas Schambron, Hossein Beladi, Ilana B. Timokhina

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

In this work we compare and contrast the stability of retained austenite during tensile testing of Nb-Mo-Al transformation-induced plasticity steel subjected to different thermomechanical processing schedules. The obtained microstructures were characterised using optical metallography, transmission electron microscopy and X-ray diffraction. The transformation of retained austenite to martensite under tensile loading was observed by in-situ high energy X-ray diffraction at 1ID / APS. It has been shown that the variations in the microstructure of the steel, such as volume fractions of present phases, their morphology and dimensions, play a critical role in the strain-induced transition of retained austenite to martensite.

Original languageEnglish
Title of host publicationSolid-Solid Phase Transformations in Inorganic Materials
PublisherTrans Tech Publications Ltd
Pages741-746
Number of pages6
ISBN (Print)9783037851432
DOIs
StatePublished - 2011
Externally publishedYes

Publication series

NameSolid State Phenomena
Volume172-174
ISSN (Print)1012-0394

Keywords

  • Synchrotron diffraction in-situ tensile test retained austenite stability high energy X-rays
  • Transformation-induced plasticity steel

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