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Lecture

WEB Anisotropic plasticity behavior and microstructure evolution under monotonic and non-monotonic loading

Friday (25.09.2020)
13:35 - 13:50 M: Modelling and Simulation 2
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During the forming of engineering materials, plastic anisotropic behavior plays a key role in the process and product design. For metallic materials, the plastic anisotropy is dominantly controlled by the microstructure. Therefore, in this study, we are aiming to characterize both the microstructure evolution and the plastic anisotropy behavior of aluminum alloys under monotonic loading and loading with strain path changes. For monotonic case, simple tensile tests along different loading directions with respect to the rolling direction are used to assess the stress and plastic deformation anisotropy. However, the industrial material forming superimpose a much more complicated loading path to the material. To simulate this, for the non-monotonic case, three types of pre-strain under uniaxial, plane-strain, and biaxial tension are conducted prior to the uniaxial tensile tests along with different loading directions. The variation of the material anisotropic behavior is of interest to the current study as this indicates the potential change of material property by any forming processes. In addition, the microstructure evolution during the pre-straining is also characterized by electron backscatter diffraction. It is also aimed in this study to couple these two types of evolution with the help of crystal plasticity modeling.

Speaker:
Prof. Dr. Junhe Lian
Aalto University
Additional Authors:
  • Xabier Gastañares
    Mondragon University
  • Wenqi Liu
    Aalto University
  • Joseba Mendiguren
    Mondragon University