Representation of the microstructure of pearlitic steels for DEM simulations of fatigue

H. Davoodi Jooneghani*, K. Six, S. S. Sharifi, M. C. Poletti, G. Trummer

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung

Abstract

The fatigue behavior of pearlitic steels in wheel-rails is correlated to the microstructure. However, existing models do barely take this correlation into account. In this work, we propose a hierarchical meshing to describe the microstructure of pearlitic steels. The mesh includes grain and block/colony boundaries, lamellae orientations, and orientation perpendicular to lamellae. We use the Voronoi Tessellation method to generate elements with the specific area fraction distribution for pearlite colony areas. The colony and block information is obtained from SEM and EBSD measurements of R260 steel to construct the mesh that represents the microstructure. Finally, we obtained the deformed microstructure via simple geometrical shearing. This meshing method is the first step for modeling fatigue crack growth anisotropy due to plastic deformation.

Originalspracheenglisch
Aufsatznummer205228
FachzeitschriftWear
Jahrgang540-541
DOIs
PublikationsstatusVeröffentlicht - 15 März 2024

ASJC Scopus subject areas

  • Physik der kondensierten Materie
  • Werkstoffmechanik
  • Oberflächen und Grenzflächen
  • Oberflächen, Beschichtungen und Folien
  • Werkstoffchemie

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