Paper Title:
Transformation Kinetics and Resulting Microstructure in MMC Reinforced with TiC Particles
  Abstract

The phase transformation kinetics on cooling and resulting microstructures of steel-based matrix composites (MMC) reinforced with TiC particles by powder metallurgy were studied. In addition, the phase transformation kinetics of the MMC were compared to those of the same steel without TiC and consolidated in the same conditions. The presence of TiC particles strongly favors the diffusive transformations in the steel matrix of the MMC. Different complementary techniques (XRD, SEM, TEM/EDX, atom probe tomography, in situ synchrotron XRD) were performed to analyze the chemical reactivity between TiC particles and the steel powders occurring during consolidation process and further heat treatments. Composition changes in the TiC as well as in the matrix were characterized. The chemical composition after treatment in the TiC particles tends toward the thermodynamic calculations with ThermoCalc. The effect of changes in chemical composition and the role of TiC particles acting as new favorable nucleation sites are discussed in regards to the obtained results.

  Info
Periodical
Solid State Phenomena (Volumes 172-174)
Edited by
Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson
Pages
747-752
DOI
10.4028/www.scientific.net/SSP.172-174.747
Citation
M. Mourot, A. Courleux, M. Dehmas, E. Aeby-Gautier, G. Geandier, O. Dezellus, J. C. Viala, O. Martin, N. Karnatak, F. Danoix, "Transformation Kinetics and Resulting Microstructure in MMC Reinforced with TiC Particles", Solid State Phenomena, Vols. 172-174, pp. 747-752, 2011
Online since
June 2011
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$32.00
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