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The Effects of Intercritical Annealing Temperature and Initial Microstructure on the Stability of Retained Austenite in a 0.1C-6Mn Steel

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Abstract:

The effects of the intercritical annealing temperature and initial microstructure on the stability of retained austenite were investigated for a 0.1C-6Mn (wt-%) steel. Medium-Mn transformation-induced plasticity (TRIP) steels exhibit a strong dependence of their mechanical properties on the variation of intercritical annealing temperature. This behavior is strongly linked to the amount and stability of the retained austenite. Thus, interrupted tensile tests were used to examine the effect of annealing temperature on the stabilization of the retained austenite. Detailed microstructural investigations were employed to elaborate the effects of its chemical and mechanical stabilization. Furthermore, the final microstructure was varied by applying the batch annealing step to an initial non-deformed and deformed microstructure respectively. Retained austenite stability along with resulting mechanical properties of the investigated medium-Mn TRIP steel was significantly influenced as the amount and morphology of the respective phases altered as a consequence of both initial microstructure and applied intercritical annealing temperature.

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Periodical:

Materials Science Forum (Volume 879)

Pages:

1847-1852

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.1847

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Online since:

November 2016

Authors:

Katharina Steineder*, Daniel Krizan, Reinhold Schneider, Coline Beal, Christof Sommitsch

Keywords:

Heat Treatment, Medium-Mn Steel, Retained Austenite Stability

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* - Corresponding Author

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