Stochastic model describing evolution of microstructural parameters during hot rolling of steel plates and strips

D Szeliga, N Czyżewska, K Klimczak, J Kusiak… - Archives of Civil and …, 2022 - Springer
Enhancing strength-ductility synergy of materials has been for decades an objective of
research on structural metallic materials. It has been shown by many researchers that …

Inverse problem in stochastic approach to modelling of microstructural parameters in metallic materials during processing

K Klimczak, P Oprocha, J Kusiak… - Mathematical …, 2022 - Wiley Online Library
The need for a reliable prediction of the distribution of microstructural parameters in metallic
materials during processing was the motivation for this work. The model describing the …

Existence, uniqueness and approximation of solutions to Carathéodory delay differential equations

FV Difonzo, P Przybyłowicz, Y Wu - Journal of Computational and Applied …, 2024 - Elsevier
In this paper we address the existence, uniqueness and approximation of solutions of delay
differential equations (DDEs) with Carathéodory type right-hand side functions. We provide …

Formulation, identification and validation of a stochastic internal variables model describing the evolution of metallic materials microstructure during hot forming

D Szeliga, N Czyżewska, K Klimczak, J Kusiak… - International Journal of …, 2022 - Springer
Construction metallic materials combine strength with formability. These features are
obtained for heterogeneous microstructures with hard constituents dispersed in a soft matrix …

A Comparative Study of Deterministic and Stochastic Models of Microstructure Evolution during Multi-Step Hot Deformation of Steels

P Oprocha, N Czyżewska, K Klimczak, J Kusiak… - Materials, 2023 - mdpi.com
Modern construction materials, including steels, have to combine strength with good
formability. In metallic materials, these features are obtained for heterogeneous multiphase …

Prediction of distribution of microstructural parameters inmetallic materials described by differential equations with recrystallization term

P Morkisz, P Oprocha, P Przybyłowicz… - International Journal …, 2019 - dl.begellhouse.com
Continuous development of the transport industry is associated with the search for new
construction materials that combine high strength with good plastic properties. Intensive …

Sensitivity analysis, identification and validation of the dislocation density-based model for metallic materials

D Szeliga, N Czyżewska… - Metallurgical …, 2021 - metallurgical-research.org
Microstructure evolution model based on the differential equation describing evolution of
dislocations was proposed. Sensitivity analysis was performed and parameters with the …

A Randomized Runge-Kutta Method for time-irregular delay differential equations

FV Difonzo, P Przybyłowicz, Y Wu, X **e - arxiv preprint arxiv:2401.11658, 2024 - arxiv.org
In this paper we investigate the existence, uniqueness and approximation of solutions of
delay differential equations (DDEs) with the right-hand side functions $ f= f (t, x, z) $ that are …

Euler scheme for approximation of solution of nonlinear ODEs under inexact information

N Czyżewska, PM Morkisz, P Przybyłowicz - Applied Numerical …, 2023 - Elsevier
We investigate error of the Euler scheme in the case when the right-hand side function of the
underlying ODE satisfies nonstandard assumptions such as local one-sided Lipschitz …

[PDF][PDF] Thermal-mechanical finite element simulation of flat bar rolling coupled with a stochastic model of microstructure evolution

D Szeliga, N Czyżewska, J Kusiak… - … Methods in Materials …, 2022 - bibliotekanauki.pl
It is generally recognized that the kinetics of phase transformations during the cooling of
steel products depends to a large extent on the state of the austenite after rolling. Austenite …