Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 23, 2018 - November 25, 2018
Recently, data assimilation technique has been becoming powerful tool to estimate materials parameters in the phase-field simulations. In this study, we focus on the adjoint method, which is one of data assimilation techniques, to estimate the thermodynamic parameters in Gibbs energy function from the composition profile data obtained by the conventional diffusion coupling method. The adjoint method is applied to the inter-diffusion theory, which provides the adjoint equations with respect to the initial composition field and the materials parameters utilized in the diffusion simulation. As a result, it is demonstrated that the proposed method can be possible to estimate the thermodynamic parameters in Gibbs energy function from the coupling composition profile data. This approach is quite effective because it opens the new methodology to use the experimental data, i.e. the entire composition profile, which has not been utilized for evaluating the thermodynamic parameters in Gibbs energy functions.
