Characteristic dislocation substructure in 101¯2 twins in hexagonal metals

F. Wang; K. Hazeli; K. D. Molodov; C. D. Barrett; T. Al-Samman; D. A. Molodov; A. Kontsos; K. T. Ramesh; H. El Kadiri; S. R. Agnew

doi:10.1016/j.scriptamat.2017.09.015

Characteristic dislocation substructure in 101¯2 twins in hexagonal metals

F. Wang, K. Hazeli, K. D. Molodov, C. D. Barrett, T. Al-Samman, D. A. Molodov, A. Kontsos, K. T. Ramesh, H. El Kadiri, S. R. Agnew

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

59 Scopus citations

Abstract

Based on transmission electron microscopy results from pure Mg single crystal examined in the current work, and Mg alloys and other hexagonal metals in literature, a characteristic dislocation substructure inside 101¯2 twins is identified. Abundant non-basal [c] and ⟨c + a⟩ perfect dislocations, as well as basal I₁ stacking faults with widths on the order of 100 nm distributed preferentially in the vicinity of a twin boundary, with a low density zone in the middle of the twin. Considering the ubiquity of 101¯2 twins, this characteristic dislocation substructure should be considered in modeling of hexagonal metal alloy deformation.

Original language	English (US)
Pages (from-to)	81-85
Number of pages	5
Journal	Scripta Materialia
Volume	143
DOIs	https://doi.org/10.1016/j.scriptamat.2017.09.015
State	Published - Jan 15 2018
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2017.09.015

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title = "Characteristic dislocation substructure in 101¯2 twins in hexagonal metals",

abstract = "Based on transmission electron microscopy results from pure Mg single crystal examined in the current work, and Mg alloys and other hexagonal metals in literature, a characteristic dislocation substructure inside 101¯2 twins is identified. Abundant non-basal [c] and ⟨c + a⟩ perfect dislocations, as well as basal I1 stacking faults with widths on the order of 100 nm distributed preferentially in the vicinity of a twin boundary, with a low density zone in the middle of the twin. Considering the ubiquity of 101¯2 twins, this characteristic dislocation substructure should be considered in modeling of hexagonal metal alloy deformation.",

author = "F. Wang and K. Hazeli and Molodov, {K. D.} and Barrett, {C. D.} and T. Al-Samman and Molodov, {D. A.} and A. Kontsos and Ramesh, {K. T.} and {El Kadiri}, H. and Agnew, {S. R.}",

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doi = "10.1016/j.scriptamat.2017.09.015",

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T1 - Characteristic dislocation substructure in 101¯2 twins in hexagonal metals

AU - Wang, F.

AU - Hazeli, K.

AU - Molodov, K. D.

AU - Barrett, C. D.

AU - Al-Samman, T.

AU - Molodov, D. A.

AU - Kontsos, A.

AU - Ramesh, K. T.

AU - El Kadiri, H.

AU - Agnew, S. R.

PY - 2018/1/15

Y1 - 2018/1/15

N2 - Based on transmission electron microscopy results from pure Mg single crystal examined in the current work, and Mg alloys and other hexagonal metals in literature, a characteristic dislocation substructure inside 101¯2 twins is identified. Abundant non-basal [c] and ⟨c + a⟩ perfect dislocations, as well as basal I1 stacking faults with widths on the order of 100 nm distributed preferentially in the vicinity of a twin boundary, with a low density zone in the middle of the twin. Considering the ubiquity of 101¯2 twins, this characteristic dislocation substructure should be considered in modeling of hexagonal metal alloy deformation.

AB - Based on transmission electron microscopy results from pure Mg single crystal examined in the current work, and Mg alloys and other hexagonal metals in literature, a characteristic dislocation substructure inside 101¯2 twins is identified. Abundant non-basal [c] and ⟨c + a⟩ perfect dislocations, as well as basal I1 stacking faults with widths on the order of 100 nm distributed preferentially in the vicinity of a twin boundary, with a low density zone in the middle of the twin. Considering the ubiquity of 101¯2 twins, this characteristic dislocation substructure should be considered in modeling of hexagonal metal alloy deformation.

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JO - Scripta Materialia

JF - Scripta Materialia

ER -

Characteristic dislocation substructure in 101¯2 twins in hexagonal metals

Abstract

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