Effect of thermomechanical processing on the microstructure and retained austenite stability during in situ tensile testing using synchrotron x-ray diffraction of NbMoAI TRIP steel.

Journal Article · Wed Jun 01 04:00:00 EDT 2011 · Solid State Phenomena

DOI:https://doi.org/10.4028/www.scientific.net/SSP.172-174.741· OSTI ID:1019259

Pereloma, E; Zhang, L; Liss, K -D; Garbe, U; Almer, J; Schambron, T; Beladi, H; Timokhina, I ^[1]

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1. X-Ray Science Division

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.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; Commonwealth of Australia; Univ. fo Wollongong
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1019259
• Report Number(s): ANL/XSD/JA-70523
• Journal Information: Solid State Phenomena, Journal Name: Solid State Phenomena Journal Issue: Jun. 2011 Vol. 172-174
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
DIMENSIONS
MARTENSITE
METALLOGRAPHY
MICROSTRUCTURE
MORPHOLOGY
PLASTICITY
PROCESSING
SCHEDULES
STABILITY
STEELS
SYNCHROTRONS
TESTING
TRANSFORMATIONS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION