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Application of thermodynamics and diffusion in solids to the development of high strength steels for the Automotive Industry

✍ Scribed by M. Goune; P. Maugis; T. Jung

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
138 KB
Volume
36
Category
Article
ISSN
0933-5137

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✦ Synopsis

This paper presents some applications of thermodynamics and diffusion in solids to the development of physical models applied to high strength steels production for the Automotive Industry. The scale of modeling is chosen to be the microstructural grain. The description of nucleation, interfacial conditions, diffusion controlled growth makes it possible to follow the process of microstructure formation, the evolution of each steel constituent and finally to describe the produced steel microstructure.

In this paper, we propose a model that predicts the kinetics of cementite dissolution and austenite growth during heating and soaking. It is based on solving the mass balance and diffusion equations written with gradients of chemical potentials as driving forces. This model is applicable to multi component systems and a good agreement between the calculations and experimental data was obtained.

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