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WEB Phase-field modeling of microstructural development during bearing steels processing

Friday (25.09.2020)
13:05 - 13:20 M: Modelling and Simulation 1
Part of:

Bearings are critical mechanical elements of a wind turbine. Wind turbine bearings operate under significant fluctuating wind-induced forces, leading to complex load spectra in the bearings steels. To increase reliability and thus the efficiency of bearings, it is desired to monitor the degradation process and understand the drivers and mechanisms of material aging leading to rolling contact fatigue. Improving the bearing material properties and its processing technology and thereby enhancing the quality of the final product is a topic of growing interest. Until now, it has not been possible to fully understand the effect of various steel processing process parameters such as thermal treatments on the essential aspects of the (non-uniform) microstructure that affects the material performance.

In this work, computational modeling of the microstructure formation is used to analyze the microstructure evolution during steel processing. The emphasis in this study is on bainitic microstructures. In order to determine effective microstructural properties, the thermal processing routes used in bearing materials are simulated using a phase-field model. The MICRESS software (MICRostructure Evolution Simulation Software) is utilized to simulate the associated phase transformations and grain growth. The resulting microstructures are analyzed quantitatively and compared with experimentally observed ones.

Ph.D. Farnaz Aghebati
Delft University of Technology
Additional Authors:
  • Jithin Abraham Mathews
    Delft University of Technology
  • Dr. Maria Giuseppina Mecozzi
    Delft University of Technology
  • Prof. Dr. Roumen Petrov
    Ghent University
  • Prof. Dr. Jilt Sietsma
    Delft University of Technology