MSE 2016 - Full Program

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Lecture

Tensile deformation of CP titanium using in-situ EBSD analysis and crystal plasticity simulations

Wednesday (28.09.2016)
15:45 - 16:00
Part of:


Titanium and its alloys are used in a wide variety of engineering applications. The evolution of microstructure and texture during plastic deformation significantly affects final microstructure and properties. In particular, the alpha titanium alloys exhibit unique mechanical behavior due to the activation of multiple slip systems and twinning behaviors. And they show strong anisotropic behavior according to initial microstructure, texture and deformation direction. Therefore the quantitative analysis of microstructure and texture is needed for understanding of deformation mechanism in the titanium alloys. In this study, the tensile deformation of CP titanium was analyzed using in-situ EBSD analysis and crystal plasticity simulations.

The information of initial microstructure and orientation obtained by EBSD was used to develop crystal plasticity finite element model. Variations of microstructure and texture upon tensile deformation was measured by in-situ EBSD analysis and compared with the calculated results by crystal plasticity simulations. The {1 0 -1 2} tensile twins formed at the beginning of deformation (0.2% strain). The orientation deviation localized at neighboring grains of twinned grains, however it was smaller in newly formed twinned grains and mother grains. Prismatic slip system was dominant, but other slip systems and twinning were operating.

Speaker:
Dr. Joo-Hee Kang
Korea Institute of Materials Science
Additional Authors:
  • Prof. Ji Hoon Kim
    Pusan National University
  • Dr. Chang-Seok Oh
    Korea Institute of Materials Science