Application of identification techniques to determine effect of carbon content in steels on rheological parameters during hot deformation

Madej, L., Hodgson, P.D. and Pietrzyk, M. 2004, Application of identification techniques to determine effect of carbon content in steels on rheological parameters during hot deformation, in NUMIFORM 2004 : Proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes : Materials Processing and Design : Modelling, Simulation and Applications, American Institute of Physics, Melville, N.Y., pp. 554-559, doi: 10.1063/1.1766584.

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Title Application of identification techniques to determine effect of carbon content in steels on rheological parameters during hot deformation
Author(s) Madej, L.
Hodgson, P.D.
Pietrzyk, M.
Conference name International Conference on Numerical Methods in Industrial Forming Processes (8th : 2004 : Columbus, Ohio)
Conference location Columbus, Ohio
Conference dates 13-17 Jun. 2004
Title of proceedings NUMIFORM 2004 : Proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes : Materials Processing and Design : Modelling, Simulation and Applications
Editor(s) Ghosh, S.
Castro, J.C.
Lee, J.K.
Publication date 2004
Start page 554
End page 559
Publisher American Institute of Physics
Place of publication Melville, N.Y.
Summary The objective of the present work is searching for the correlation between the carbon content in steels and the parameters of the rheological models, which are used to describe the materials behavior during hot plastic deformation. This correlation can be expected in the internal variable models, which are based on physical phenomena occurring in the material. Such a model, based on the dislocation density as the internal variable, is investigated in this work. The experiments including hot torsion tests are used for the analysis.
The procedure is composed of three parts. Plastometric tests were performed for steels with various carbon content. Optimization techniques were applied next to determine the coefficients in the internal variable rheological model for these steels. Two versions of the model are considered. One is based on the average dislocation density and the second accounts for the distribution of dislocation densities. Evaluation of correlation between carbon content and such coefficients in the models as activation energy for self diffusion, activation energy for recrystallization, grain boundary mobility, recovery coefficient etc. was the main objective of the work. In consequence, the model which may be used for simulation of hot forming processes for steels with various chemical compositions, is proposed.
ISBN 0735401888
9780735401884
Language eng
DOI 10.1063/1.1766584
Field of Research 091399 Mechanical Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category E2 Full written paper - non-refereed / Abstract reviewed
Copyright notice ©2004, American Institute of Physics
Persistent URL http://hdl.handle.net/10536/DRO/DU:30014297

Document type: Conference Paper
Collection: School of Engineering
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