TY - JOUR
T1 - Representation of the microstructure of pearlitic steels for DEM simulations of fatigue
AU - Davoodi Jooneghani, H.
AU - Six, K.
AU - Sharifi, S. S.
AU - Poletti, M. C.
AU - Trummer, G.
N1 - Publisher Copyright:
© 2024 The Authors
PY - 2024/3/15
Y1 - 2024/3/15
N2 - 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.
AB - 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.
KW - Fatigue crack growth
KW - Microstructure representation
KW - Pearlitic steel
KW - Voronoi tessellation method
KW - Wheel and rail contact
UR - http://www.scopus.com/inward/record.url?scp=85182256766&partnerID=8YFLogxK
U2 - 10.1016/j.wear.2023.205228
DO - 10.1016/j.wear.2023.205228
M3 - Article
AN - SCOPUS:85182256766
SN - 0043-1648
VL - 540-541
JO - Wear
JF - Wear
M1 - 205228
ER -