2024-03-29T14:39:35Z
https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:00007504
2022-12-13T02:20:55Z
1:87
X-ray microdiffraction and strain gradient crystal plasticity studies of geometrically necessary dislocations near a Ni bicrystal grain boundary
Ohashi, Tetsuya
Barabash, R.I.
Pang, J.W.L.
Barabash, O.M.
open access
Crystal plasticity
Dislocations
Grain boundaries
Stress relaxation
Polycrystalline material
We compare experimental measurements of inhomogeneous plastic deformation in a Ni bicrystal with crystal plasticity simulations. Polychromatic X-ray microdiffraction, orientation imaging microscopy and scanning electron microscopy, were used to characterize the geometrically necessary dislocation distribution of the bicrystal after uniaxial tensile deformation. Changes in the local crystallographic orientations within the sample reflect its plastic response during the tensile test. Elastic strain in both grains increases near the grain boundary. Finite element simulations were used to understand the influence of initial grain orientation and structural inhomogeneities on the geometrically necessary dislocations arrangement and distribution and to understand the underlying materials physics.
NOTICE: This is the author's version of a work accepted for publication by Elsevier. Changes resulting from the publishing process, including peer review, editing, corrections, structual formatting and other quality control mechanisms, may not be reflected in this document. Changes may have been to this work since it was submitted for publication.
application/pdf
Elsevier
2009-05
eng
journal article
AM
https://kitami-it.repo.nii.ac.jp/records/7504
http://doi.org/10.1016/j.ijplas.2008.04.009
International Journal of Plasticity
25
5
920
941
https://kitami-it.repo.nii.ac.jp/record/7504/files/kikai_ohashi_a_02.pdf
application/pdf
1.1 MB
2016-11-22