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- Title
Process Maps for Predicting Austenite Fraction (vol.%) in Medium-Mn Third-Generation Advanced High-Strength Steels.
- Authors
Mehrabi, Azin; Zurob, Hatem S.; McDermid, Joseph R.
- Abstract
Process maps were developed using a combination of microstructural analysis and DICTRA-based modeling to predict the austenite vol.% as a function of the intercritical annealing parameters and starting microstructure. The maps revealed a strong dependence of the calculated austenite fraction (vol.%) on the Mn content (4–12 wt.%) and intercritical annealing temperatures (600 °C to 740 °C). The calculations were carried out for constant carbon, Al, and Si contents of 0.2 wt.%, 1.5 wt.%, and 1.0 wt.%, respectively. A modified empirical equation proposed by Koistinen and Marburger was employed to calculate the room-temperature retained austenite vol.% as a function of the intercritical annealing temperature, including the effect of the austenite composition. The process maps offer valuable insights for designing intercritical treatments of medium-Mn steels, aiding in the optimization of steel properties for automotive applications.
- Subjects
AUSTENITE; STEEL; DUAL-phase steel; HIGH strength steel; FORECASTING; MICROSTRUCTURE; FRACTIONS; SET-valued maps
- Publication
Materials (1996-1944), 2024, Vol 17, Issue 5, p993
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma17050993