Anomalous activity of nonbasal dislocations in AZ31 Mg alloys at room temperature

T. Kobayashi; J. Koike; T. Mukai; M. Suzuki; H. Watanabe; K. Maruyama; K. Higashi

doi:10.4028/www.scientific.net/msf.419-422.231

Anomalous activity of nonbasal dislocations in AZ31 Mg alloys at room temperature

T. Kobayashi, J. Koike, T. Mukai, M. Suzuki, H. Watanabe, K. Maruyama, K. Higashi

ENG - Materials Science

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

AZ31 Mg alloy samples were extruded by an equal channel angular extrusion (ECAE) process and subsequently annealed to obtain fine-grained material with a low dislocation density. Tensile tests at room temperature exhibited an apparent steady-state deformation region and a large tensile elongation of 47%. The deformed microstructure at an elongation of 2% indicated a substantial cross-slip to nonbasal planes possibly induced by grain-boundary compatibility effects. The nonbasal segments of dislocations were found to consist of 40% of the total dislocation density at a yield anisotropy factor of only 1.1 instead of an expected value of 100 from single-crystal experiments.

Original language	English
Pages (from-to)	231-236
Number of pages	6
Journal	Materials Science Forum
Volume	419-422
Issue number	I
DOIs	https://doi.org/10.4028/www.scientific.net/msf.419-422.231
Publication status	Published - 2003
Event	Proceedings of the Second Osaka International Conference on Platform Science and Technology for Advanced Magnesium Alloys 2003 - Osaka, Japan Duration: 2003 Jan 26 → 2003 Jan 30

Keywords

AZ31
Dislocations
ECAE
Grain boundary

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.4028/www.scientific.net/msf.419-422.231

Cite this

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abstract = "AZ31 Mg alloy samples were extruded by an equal channel angular extrusion (ECAE) process and subsequently annealed to obtain fine-grained material with a low dislocation density. Tensile tests at room temperature exhibited an apparent steady-state deformation region and a large tensile elongation of 47%. The deformed microstructure at an elongation of 2% indicated a substantial cross-slip to nonbasal planes possibly induced by grain-boundary compatibility effects. The nonbasal segments of dislocations were found to consist of 40% of the total dislocation density at a yield anisotropy factor of only 1.1 instead of an expected value of 100 from single-crystal experiments.",

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T1 - Anomalous activity of nonbasal dislocations in AZ31 Mg alloys at room temperature

AU - Kobayashi, T.

AU - Koike, J.

AU - Mukai, T.

AU - Suzuki, M.

AU - Watanabe, H.

AU - Maruyama, K.

AU - Higashi, K.

PY - 2003

Y1 - 2003

N2 - AZ31 Mg alloy samples were extruded by an equal channel angular extrusion (ECAE) process and subsequently annealed to obtain fine-grained material with a low dislocation density. Tensile tests at room temperature exhibited an apparent steady-state deformation region and a large tensile elongation of 47%. The deformed microstructure at an elongation of 2% indicated a substantial cross-slip to nonbasal planes possibly induced by grain-boundary compatibility effects. The nonbasal segments of dislocations were found to consist of 40% of the total dislocation density at a yield anisotropy factor of only 1.1 instead of an expected value of 100 from single-crystal experiments.

AB - AZ31 Mg alloy samples were extruded by an equal channel angular extrusion (ECAE) process and subsequently annealed to obtain fine-grained material with a low dislocation density. Tensile tests at room temperature exhibited an apparent steady-state deformation region and a large tensile elongation of 47%. The deformed microstructure at an elongation of 2% indicated a substantial cross-slip to nonbasal planes possibly induced by grain-boundary compatibility effects. The nonbasal segments of dislocations were found to consist of 40% of the total dislocation density at a yield anisotropy factor of only 1.1 instead of an expected value of 100 from single-crystal experiments.

KW - AZ31

KW - Dislocations

KW - ECAE

KW - Grain boundary

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T2 - Proceedings of the Second Osaka International Conference on Platform Science and Technology for Advanced Magnesium Alloys 2003

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ER -

Anomalous activity of nonbasal dislocations in AZ31 Mg alloys at room temperature

Abstract

Keywords

ASJC Scopus subject areas

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