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Meeting MS&T21: Materials Science & Technology
Symposium Nucleation of Solid-State Phase Transformations
Presentation Title Effect of Cooling Rate and Austenitic Grain Size on the Austenite Decomposition Kinetics in a Low- carbon Steel
Author(s) Carlos Alberto Barajas-Miguel, Octavio Vázquez-Gómez, Antonio Oliver-Reynoso, Edgar López-Martínez, Héctor Javier Vergara-Hernández
On-Site Speaker (Planned) Antonio Oliver-Reynoso
Abstract Scope The influence of cooling rate and austenitic grain size on the austenite decomposition kinetics in a low-carbon steel under cooling conditions were analyzed. Austenite decomposition occurred in two stages: 1) formation of ferrite from austenite and 2) formation of pearlite from residual austenite and ferrite. Non-isothermal analysis was performed to determine the critical decomposition temperatures, as well as, the activation energies employing Kissinger method. Finally the continuous cooling transformation diagrams were constructed in a range of 1 to 25 ºC min-1. The austenite grain size was estimated using a semi-empiric equation, while the decomposition and austenite kinetics were described in terms of the undercooling and the JMA model. It was observed that the undercooling influenced the austenite decomposition behavior, while the undercooling was affected by the austenite grain size and the cooling rate.


3-dimensional Observation of Bainite from Austenite Grain Boundary in 0.6wt% Carbon Steel.
Critical Nuclei at Hetero-phase Interfaces
Effect of Cooling Rate and Austenitic Grain Size on the Austenite Decomposition Kinetics in a Low- carbon Steel
Formation of the γ’’’-Ni2(Cr, Mo, W) Phase during Two-step Heat Treatment in Haynes® 244® Alloy
Identification of Critical Nucleation Events by the Gromov-Wasserstein Distance
Investigation of Nucleation Mechanisms Associated with the Formation of Coprecipitates in Ni-based Superalloys
Modeling Microstructure Evolution Using the Steepest-entropy-ascent Quantum Thermodynamic Framework
Observing the Solid-state Processes under Additive Manufacturing Conditions Inside the TEM
P1-28: Structure Influenced Rapid Hydrogenation Using Metal-acid Contacts on Crystallographically Oriented VO2 Thin Films

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