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Ponencias en congresos:
Integrated Landau Modeling of Microstructural and Energetic Natures of A/M Transformation in Polycrystalline Q&P Steels
Año:2014
Áreas de investigación
  • Química física de materiales,
  • Química computacional,
  • Cinética,
  • Termodinámica,
  • Fisica sm -- estructura de materiales,
  • Transiciones de fase estructurales
Datos
Descripción
The Q&P (Quenching & Partitioning) process, undergoing a partial austenite-to-martensite (A/M) transformation under quenching followed by annealing-promoted carbon partitioning, opens up a new way to develop steel microstructures with exceptionally advantageous combination of A/M phases at the industrial scale. Coupling the Ginzburg-Landau theory seamlessly with computational thermodynamics/kinetics, we develop an integrated Landau model at mesoscale that enables, for the first time, the intricate A/M microstructure interplayed by the diffusive-displacive transformations to be described in polycrystalline steels while correctly grasps the underdamped nature of the energetic convergence for the phonon vibration of system. We illustrate the modeling by representing the spatiotemporal distribution of carbon and motion of A/M interfaces observed in new Q&P steels, as a consequence, demonstrating it is the coupling between elasticity and diffusion that concurrently governs partitioning. To conclude, the integrated Landau model acquires realistic driving force of the Q&P process from its coupled thermo-kinetic database and real materials parameters and validation from such experimental techniques as nanoindentation, laser confocal in-situ metallography and electron back-scattered diffraction etc, thereby finding its applications in microstructure controlling and design in Q&P productions.
Internacional
Si
Nombre congreso
Materials Science and Engineering 2014- Young Researchers meet Professionals
Tipo de participación
960
Lugar del congreso
Darmstadt Germany
Revisores
Si
ISBN o ISSN
n/a
DOI
n/a
Fecha inicio congreso
23/09/2014
Fecha fin congreso
25/09/2014
Desde la página
49
Hasta la página
49
Título de las actas
10
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Guanglong Xu (UPM)
  • Autor: Dong-Wook Lee
  • Autor: Yi Chen (UPM)
  • Autor: Yuwen Cui
  • Autor: Fco. Javier Llorca Martinez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Ciencia de Materiales
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