Prediction of Continuous Cooling Transformation Diagrams for Dual-Phase Steels from the Intercritical Region

The purpose of the present work is the implementation and validation of a model able to predict the microstructure changes and the mechanical properties in the modern high-strength dual-phase steels after the continuous annealing process line (CAPL) and galvanizing (Galv) process. Experimental conti...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2011-09, Vol.42 (9), p.2781-2793
Main Authors: Colla, V., DeSanctis, M., Dimatteo, A., Lovicu, G., Valentini, R.
Format: Article
Language:English
Subjects:
Alloy steels
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cooling
Dual phase steels
Duplex stainless steels
Exact sciences and technology
Materials Science
Mathematical models
Mechanical properties
Metallic Materials
Metals. Metallurgy
Microstructure
Nanotechnology
Steel
Structural Materials
Structural steels
Surfaces and Interfaces
Thin Films
Transformations
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Summary:The purpose of the present work is the implementation and validation of a model able to predict the microstructure changes and the mechanical properties in the modern high-strength dual-phase steels after the continuous annealing process line (CAPL) and galvanizing (Galv) process. Experimental continuous cooling transformation (CCT) diagrams for 13 differently alloying dual-phase steels were measured by dilatometry from the intercritical range and were used to tune the parameters of the microstructural prediction module of the model. Mechanical properties and microstructural features were measured for more than 400 dual-phase steels simulating the CAPL and Galv industrial process, and the results were used to construct the mechanical model that predicts mechanical properties from microstructural features, chemistry, and process parameters. The model was validated and proved its efficiency in reproducing the transformation kinetic and mechanical properties of dual-phase steels produced by typical industrial process. Although it is limited to the dual-phase grades and chemical compositions explored, this model will constitute a useful tool for the steel industry.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-011-0702-3