Effect of the Metallurgical State of Austenite on the Microtexture Properties of the Bainitic Transformation in a Low Alloy Steel

Sophie Lubin; Anne Francoise Gourgues-Lorenzon; Brigitte Bacroix; Hélène Réglé; Frank Montheillet

doi:10.4028/www.scientific.net/SSP.172-174.772

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HomeSolid State PhenomenaSolid State Phenomena Vols. 172-174Effect of the Metallurgical State of Austenite on...

Effect of the Metallurgical State of Austenite on the Microtexture Properties of the Bainitic Transformation in a Low Alloy Steel

Abstract:

The effect of the metallurgical state of austenite (undeformed vs. deformed vs. deformed + recrystallised) on the properties of the austenite to bainite transformation were investigated thanks to thermal (Gleeble simulations) and thermomechanical (hot torsion) treatments. No obvious influence of the state of austenite was found, using electron backscatter diffraction, on the resulting microtexture. Advantages and drawbacks of using misorientation angle histograms vs. axis-angle pair distribution are discussed regarding investigations of local variant selection. For an austenite grain size higher than about 50 µm, a strong effect of the transformation temperature was evidenced, bainite formed at lower temperature (530°C) exhibiting a microtexture close to that of lath martensite in the same steel.

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Periodical:

Solid State Phenomena (Volumes 172-174)

Pages:

772-777

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.172-174.772

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Online since:

June 2011

Authors:

Sophie Lubin, Anne Francoise Gourgues-Lorenzon, Brigitte Bacroix, Hélène Réglé, Frank Montheillet

Keywords:

Bainite, Electron Backscatter Diffraction (EBSD), Hot Torsion, Steel, Variant Selection

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