Studying grain boundary regions in polycrystalline materials using spherical nano-indentation and orientation imaging microscopy

In this article, we report on the application of our spherical nanoindentation data analysis protocols to study the mechanical response of grain boundary regions in as-cast and 30% deformed polycrystalline Fe–3%Si steel. In particular, we demonstrate that it is possible to investigate the role of gr...

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Bibliographic Details
Published in:Journal of materials science 2012-01, Vol.47 (2), p.815-823
Main Authors: Pathak, Siddhartha, Michler, Johann, Wasmer, Kilian, Kalidindi, Surya R.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Crystal lattices
Crystal structure
Crystallography and Scattering Methods
Data analysis
Deformation
Dislocation density
Grain boundaries
Materials Science
Mechanical analysis
Mechanical properties
Microscope and microscopy
Microscopy
Misalignment
Nanoindentation
Orientation
Polycrystals
Polymer Sciences
Silicon steels
Solid Mechanics
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Summary:In this article, we report on the application of our spherical nanoindentation data analysis protocols to study the mechanical response of grain boundary regions in as-cast and 30% deformed polycrystalline Fe–3%Si steel. In particular, we demonstrate that it is possible to investigate the role of grain boundaries in the mechanical deformation of polycrystalline samples by systematically studying the changes in the indentation stress–strain curves as a function of the distance from the grain boundary. Such datasets, when combined with the local crystal lattice orientation information obtained using orientation imaging microscopy, open new avenues for characterizing the mechanical behavior of grain boundaries based on their misorientation angle, dislocation density content near the boundary, and their propensity for dislocation source/sink behavior.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-011-5859-z