Modellierung von Umformprozessen

After a review of continuum mechanical and thermodynamic fundamentals, the mathematical foundations for the semi-empirical models (Avrami, Arrhenius and Hall-Petch approaches) for describing the microstructure are presented and a link to physical modelling is established.

The phenomenological solutions for describing the forming and temperature state with typical material models, such as dissolution kinetics, grain growth, recovery, dynamic recrystallisation, static recrystallisation, precipitation kinetics, phase transition and property models are discussed using examples. At the same time, the determination of parameters for the individual phenomena is discussed. In a practical course, students are shown selected options for using commercial FEM programmes. The students' own examples for modelling process and material behaviour will be developed during the lecture under supervision, mainly using Python.

The following course/module was developed at the TU Bergakademie Freiberg.

Learning outcomes / Competencies:

Ability to create models for the description of forming, temperature and material conditions in typical forming zones and to interpret the results as well as to select and evaluate the methods for determining model parameters. Combine the models to describe entire process chains, e.g., hot strip mill, and develop solution strategies. The examples discussed also enable a quantitatively reliable handling of typical state variables for steel and selected non-ferrous alloys.