The effect of twist angle on anisotropic mobility of {1 1 0} hexagonal dislocation networks in α-iron

J. B. Yang; Y. N. Osetsky; R. E. Stoller; Y. Nagai; M. Hasegawa

doi:10.1016/j.scriptamat.2012.01.061

The effect of twist angle on anisotropic mobility of {1 1 0} hexagonal dislocation networks in α-iron

J. B. Yang, Y. N. Osetsky, R. E. Stoller, Y. Nagai, M. Hasegawa

Microstructural Evolution Modeling

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

The anisotropic mobility of hexagonal dislocation networks (HDNs) in a series of (1 1̄ 0) twist boundaries under applied shear stress has been studied at the atomic scale in α-iron. A strong angular effect on the HDN mobility is found to be correlated with the dislocation core structure. The vector form of the Orowan equation and differential displacement maps of dislocation cores are used to account for the HDN behavior under loading.

Original language	English
Pages (from-to)	761-764
Number of pages	4
Journal	Scripta Materialia
Volume	66
Issue number	10
DOIs	https://doi.org/10.1016/j.scriptamat.2012.01.061
State	Published - May 2012

Funding

This research was supported by the US Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division (JBY and YNO) and the Office of Fusion Energy Sciences (RES). Y.N. and M.H. would like to thank Grant-in-Aids for Scientific Research of the Ministry of Education, Science and Culture (Nos. 17002009 , 18686077 and 15106015 ). The authors would like to thank Prof. Anna Serra for helpful discussions.

Funders	Funder number
U.S. Department of Energy
Basic Energy Sciences
Fusion Energy Sciences
Division of Materials Sciences and Engineering
Japan Society for the Promotion of Science	24246155, 21246142
Ministry of Education, Culture, Sports, Science and Technology	17002009, 18686077, 15106015

Keywords

Atomic simulation
Dislocations
Grain boundary defects
Plastic deformation
Yield phenomena

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10.1016/j.scriptamat.2012.01.061

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AU - Nagai, Y.

AU - Hasegawa, M.

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KW - Atomic simulation

KW - Dislocations

KW - Grain boundary defects

KW - Plastic deformation

KW - Yield phenomena

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The effect of twist angle on anisotropic mobility of {1 1 0} hexagonal dislocation networks in α-iron

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