|
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 |