A numerical study for the estimation of a convection heat transfer coefficient during a metallurgical “Jominy end-quench” test

A numerical method for the two-dimensional estimation of a convection heat transfer coefficient is developped for a rapid metallurgical heat treatment: the “Jominy end-quench” test. The estimation algorithm is based on the iterative regularization method and on the conjugate gradient and adjoint met...

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Bibliographic Details
Published in:International journal of thermal sciences 2002-06, Vol.41 (6), p.517-527
Main Authors: Le Masson, Philippe, Loulou, Tahar, Artioukhine, Eugène, Rogeon, Philippe, Carron, Denis, Quemener, Jean-Jacques
Format: Article
Language:English
Subjects:
16MND5 stell
Applied sciences
Conjugate gradient
Engineering Sciences
Exact sciences and technology
Hardening. Tempering
Heat treatment
Inverse method
Iterative regularization
Jominy end-quench test
Metals. Metallurgy
Nickel
Production techniques
Thermo-metallurgical modelisation
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Summary:A numerical method for the two-dimensional estimation of a convection heat transfer coefficient is developped for a rapid metallurgical heat treatment: the “Jominy end-quench” test. The estimation algorithm is based on the iterative regularization method and on the conjugate gradient and adjoint methods. The procedure is verified for two different materials. The first material, the Nickel, has no metallurgic transformation. The second one, the 16MND5 steel, has transformations implying high nonlinearities in the material. The estimation is simulated numerically for three types of heat transfer coefficients and theoritical thermal cycles. One of these coefficients can be brought together with an experimental case. For the noised thermal cycles the solution is stabilized by the iterative regularization.
ISSN:1290-0729
1778-4166
DOI:10.1016/S1290-0729(02)01345-5