Material Data Identification in an Induction Hardening Test Rig with Physics-Informed Neural Networks

Abstract

Physics-Informed neural networks (PINNs) have demonstrated remarkable performance in solving partial differential equations (PDEs) by incorporating the governing PDEs into the network’s loss function during optimization. PINNs have been successfully applied to diverse inverse and forward problems. This study investigates the feasibility of using PINNs for material data identification in an induction hardening test rig. By utilizing temperature sensor data and imposing the heat equation with initial and boundary conditions, thermo-physical material properties, such as specific heat, thermal conductivity, and the heat convection coefficient, were estimated. To validate the effectiveness of the PINNs in material data estimation, benchmark data generated by a finite element model (FEM) of an air-cooled cylindrical sample were used. The accurate identification of the material data using only a limited number of virtual temperature sensor data points was demonstrated. The influence of the sensor positions and measurement noise on the uncertainty of the estimated parameters was examined. The study confirms the robustness and accuracy of this approach in the presence of measurement noise, albeit with lower efficiency, thereby requiring more time to converge. Lastly, the applicability of the presented approach to real measurement data obtained from an air-cooled cylindrical sample heated in an induction heating test rig was discussed. This research contributes to the accurate offline estimation of material data and has implications for optimizing induction heat treatments.

The Design of a System for the Induction Hardening of Steels Using Simulation Parameters

“…Finally, it should be emphasized that induction hardening belongs to the complex multiphysics parameterized problems [27], and thus, it is highly complicated for calculation and simulation. Different approaches have been used to simulate the process: using an algorithm scheme [28], the finite element method [29], various numerical modelling with multiparameter material properties [30], data-driven analysis with applied multi-linear regression [31], or the nonlinear regression technique [27] and neural networks [32].…”