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

Authors

E V. Pereloma, University of WollongongFollow
Laichang ZhangFollow
Klaus-Dieter Liss, ANSTOFollow
Ulf Garbe, Aust Nuclear Science and Technology Organisation
Jonathan Almer, Argonne National Laboratory
Thomas SchambronFollow
Hossein Beladi, Deakin University
Ilana B. Timokhina, Deakin UniversityFollow

RIS ID

38211

Publication Details

Pereloma, E., Zhang, L., Liss, K., Garbe, U., Almer, J., Schambron, T., Beladi, H. and Timokhina, I. (2011). 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. Solid State Phenomena, 172-174 741-746.

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.