Symposium: Structural Transitions and Local Deformation Processes at and near Grain Boundaries

Metallurgical and Materials Transactions A

, Volume 42, Issue 3, pp 676-683

First online:

Observation of Deformation and Lattice Rotation in a Cu Bicrystal

  • David P. FieldAffiliated withSchool of Mechanical and Materials Engineering, Washington State University Email author 
  • , A. AlankarAffiliated withSchool of Mechanical and Materials Engineering, Washington State UniversityDepartment of Microstructure Physics and Metal Forming, Max-Planck-Institut für Eisenforschung GmbH

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Abstract

The current work examines deformation at grain boundaries from an experimental viewpoint. The orientation images of a pseudointernal surface during interrupted channel die deformations of a Cu bicrystal show the evolution of lattice orientation and crystallite fragmentation near the grain boundary. The experiments demonstrate that a region near the boundary is influenced strongly by neighboring grain deformation and lends support to the development of deformation models that include the effects of boundary character and nonlocal slip system interaction. Two crystal plasticity models of the experiment were implemented with a limited degree of success in modeling the observed behavior.