High temperature microstructure and mechanical properties of as-cast medium Mn steel with V addition

This research is focused on the development of a novel medium Mn steel with V-addition (0.14 wt.%), which belongs to the Advanced High Strength Steels (AHSS). In order to predict the equilibrium phases, thermodynamic simulation was used. The microstructure of the as-cast steel was composed of retain...

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Bibliographic Details
Published in:International journal of cast metals research (Online) 2022-07, Vol.35 (4), p.111-120
Main Authors: Gonzalez-Castillo, Ana Claudia, Garay-Reyes, Carlos Gamaliel, Hernández-Rivera, José Luis
Format: Article
Language:English
Subjects:
hot flow behaviour
Medium Mn steel
microstructural characterisation
thermodynamic simulation
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Summary:This research is focused on the development of a novel medium Mn steel with V-addition (0.14 wt.%), which belongs to the Advanced High Strength Steels (AHSS). In order to predict the equilibrium phases, thermodynamic simulation was used. The microstructure of the as-cast steel was composed of retained austenite, α´-martensite/α-ferrite and a very small amount of ɛ-martensite. To understand the hot flow behaviour of the as-cast steel, hot compression tests were performed at 800°C and 1000°C with a strain rate of 0.83 s −1 and 0.083 s −1 , the results were compared to a V-free steel taken from the literature. A significant increase in the applied stress was observed in the samples deformed at 800°C, especially, at the strain rate of 0.083s −1 . Finally, to achieve a better understanding of this behaviour, the microstructure of the V-added steel was studied after hot compression tests.
ISSN:1364-0461
1743-1336
DOI:10.1080/13640461.2022.2114668