Investigation of boriding kinetics of AISI D2 steel
| Autor: | A. Arenas-Flores, Mourad Keddam, O. Damián-Mejía, Juan Hernández-Ávila, M. A. Flores-Rentería, Martín Ortiz-Domínguez, M. Elias-Espinosa |
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| Rok vydání: | 2014 |
| Předmět: |
Diffraction
Materials science Scanning electron microscope Mass balance Metallurgy chemistry.chemical_element Surfaces and Interfaces Activation energy Atmospheric temperature range Condensed Matter Physics Surfaces Coatings and Films law.invention Optical microscope chemistry law Materials Chemistry Composite material Boron Boriding |
| Zdroj: | Surface Engineering. 30:490-497 |
| ISSN: | 1743-2944 0267-0844 |
| DOI: | 10.1179/1743294414y.0000000273 |
| Popis: | A diffusion model was suggested to analyse the growth kinetics of Fe2B layers formed on AISI D2 steel by the pack-boriding process. It was used to estimate the boron diffusion coefficients of Fe2B in the temperature range of 1123–1273 K by applying the mass balance equation at the (Fe2B/substrate) interface. The proposed model was validated experimentally at 1253 K for a treatment time of 5 h by comparing the experimental Fe2B layer thickness with the predicted value. Furthermore, the pack-borided AISI D2 steel was characterised by optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction analysis. A contour diagram describing the evolution of Fe2B layer thickness as a function of the process variables was also proposed. In addition, the boron activation energy for AISI D2 steel was found to be equal to 201·50 kJ mol−1, on the basis of our experimental results. |
| Databáze: | OpenAIRE |
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