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Erschienen in: Metallurgical and Materials Transactions A 3/2011

01.03.2011 | Symposium: Structural Transitions and Local Deformation Processes at and near Grain Boundaries

Finite Element Study of Intragrain Plastic Heterogeneity near a Triple Junction

verfasst von: Anand Krishna Kanjarla, Laurent Delannay, Paul Van Houtte

Erschienen in: Metallurgical and Materials Transactions A | Ausgabe 3/2011

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Abstract

In plastically deforming polycrystals, grains interact with their surroundings resulting in heterogeneous deformation fields both at inter- and intragrain level. When the crystal plasticity finite element method (CPFEM) is employed to predict such heterogeneity, splitting of grains is occasionally observed. In the present study, detailed local strain analysis is performed in such subdivided grain and its neighbors. The role of local interactions at the grain boundaries and of the initial orientation of the grain is investigated. It is shown that a hard grain surrounded by relatively softer grains is prone to subdivide when subjected to opposing shears.

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Fußnoten
1
The average orientation of a volume is calculated as the lattice orientation with the minimum disorientation to all orientations in that volume.[9]
 
2
As the critical resolved shear stress τ c is identical in all slip systems, the Taylor factor may be computed as the ratio of the von Mises equivalent stress and τ c .
 
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Metadaten
Titel
Finite Element Study of Intragrain Plastic Heterogeneity near a Triple Junction
verfasst von
Anand Krishna Kanjarla
Laurent Delannay
Paul Van Houtte
Publikationsdatum
01.03.2011
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions A / Ausgabe 3/2011
Print ISSN: 1073-5623
Elektronische ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-010-0455-4

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