Kinetics of Solute Partitioning During Intercritical Annealing of a Medium-Mn Steel

The evolution of austenite fraction and solute partitioning (Mn, Al, and C) during intercritical annealing was calculated for a medium-Mn steel containing 11 pct Mn. Austenite growth takes place in three stages. The first stage is growth under non-partitioning local equilibrium (NPLE) controlled by...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2015-11, Vol.46 (11), p.4841-4846
Main Authors: Kamoutsi, H., Gioti, E., Haidemenopoulos, Gregory N., Cai, Z., Ding, H.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Communication
Kinetics
Materials Science
Metallic Materials
Nanotechnology
Steel
Steel alloys
Structural Materials
Surfaces and Interfaces
Temperature
Thin Films
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Summary:The evolution of austenite fraction and solute partitioning (Mn, Al, and C) during intercritical annealing was calculated for a medium-Mn steel containing 11 pct Mn. Austenite growth takes place in three stages. The first stage is growth under non-partitioning local equilibrium (NPLE) controlled by carbon diffusion in ferrite. The second stage is growth under partitioning local equilibrium (PLE) controlled by diffusion of Mn in ferrite. The third stage is shrinkage of austenite under PLE controlled by diffusion of Mn in austenite. During PLE growth, the austenite is progressively enriched in Mn. Compositional spikes evolve early during NPLE growth and broaden with annealing temperature and time.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-015-3118-7