Influence of interface mobility on the evolution of Austenite-Martensite grain assemblies during annealing
- Los Alamos National Laboratory
- DELFT UNIV OF TECH
- COLORADO SCHOOL OF MINES
The quenching and partitioning (Q&P) process is a new heat treatment for the creation of advanced high-strength steels. This treatment consists of an initial partial or full austenitization, followed by a quench to form a controlled amount of martensite and an annealing step to partition carbon atoms from the martensite to the austenite. In this work, the microstructural evolution during annealing of martensite-austenite grain assemblies has been analyzed by means of a modeling approach that considers the influence of martensite-austenite interface migration on the kinetics of carbon partitioning. Carbide precipitation is precluded in the model, and three different assumptions about interface mobility are considered, ranging from a completely immobile interface to the relatively high mobility of an incoherent ferrite-austenite interface. Simulations indicate that different interface mobilities lead to profound differences in the evolution of microstructure that is predicted during annealing.
- Research Organization:
- Los Alamos National Laboratory (LANL)
- Sponsoring Organization:
- DOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 956590
- Report Number(s):
- LA-UR-09-01638; LA-UR-09-1638
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
Similar Records
Microstructural Features of Quenching and Partitioning: A New Martensitic Steel Heat Treatment