Physikalisch basierte Modellierung der Gefügeentwicklung während des Warmwalzens von Aluminiumlegierungen

Translated title of the contribution: Physical based microstructure modeling during the hot rolling of aluminium alloys

Pavel Sherstnev

Research output: ThesisDoctoral Thesis

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Abstract

Tailored product properties require sound process simulation and structural modelling. Materials strengthening and softening during hot rolling can be described by physical based models. Additionally, microstructure changes statically by softening and because of phase transformation during inter-pass time as well as cooling. A physical model based on three types of dislocations and three nucleation sites for re-crystallized grains is applied to plastomechanical simulation. This model was imple-mented into a commercial Finite Element analysis package FORGE 2008 to calculate both the structure evolution during and the recrystallized volume fraction after hot working of aluminium alloy 5083. The precipitation kinetics during homogenisation was investigated by use of the ther-modynamic calculation software MatCalc. To validate the simulation results hot rolling experiments were performed by means of a laboratory mill. The grain structure evolu-tion was analysed by electron backscatter diffraction (EBSD).
Translated title of the contributionPhysical based microstructure modeling during the hot rolling of aluminium alloys
Original languageGerman
QualificationDr.mont.
Supervisors/Advisors
  • Kozeschnik, Ernst, Assessor B (external), External person
  • Sommitsch, Christof, Assessor A (internal)
Publication statusPublished - 2009

Bibliographical note

no embargo

Keywords

  • Aluminium
  • microstructure modelling
  • FEM
  • dislocation density
  • subgrain structure
  • nucleation
  • static recrystallization
  • grain growth
  • hot rolling
  • EBSD

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