Dislocation-twin interactions in nanocrystalline fcc metals

Y. T. Zhu; X. L. Wu; X. Z. Liao; J. Narayan; L. J. Kecskés; S. N. Mathaudhu

doi:10.1016/j.actamat.2010.10.028

Dislocation-twin interactions in nanocrystalline fcc metals

Y. T. Zhu^*, X. L. Wu, X. Z. Liao, J. Narayan, L. J. Kecskés, S. N. Mathaudhu

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

364 Citations (Scopus)

Abstract

Dislocation interaction with and accumulation at twin boundaries have been reported to significantly improve the strength and ductility of nanostructured face-centered cubic (fcc) metals and alloys. Here we systematically describe plausible dislocation interactions at twin boundaries. Depending on the characteristics of the dislocations and the driving stress, possible dislocation reactions at twin boundaries include cross-slip into the twinning plane to cause twin growth or de-twinning, formation of a sessile stair-rod dislocation at the twin boundary, and transmission across the twin boundary. The energy barriers for these dislocation reactions are described and compared. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	812-821
Journal	Acta Materialia
Volume	59
Issue number	2
Online published	4 Nov 2010
DOIs	https://doi.org/10.1016/j.actamat.2010.10.028
Publication status	Published - Jan 2011
Externally published	Yes

Research Keywords

Dislocations
fcc
Interactions
Nanocrystalline materials
Twin boundaries

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title = "Dislocation-twin interactions in nanocrystalline fcc metals",

abstract = "Dislocation interaction with and accumulation at twin boundaries have been reported to significantly improve the strength and ductility of nanostructured face-centered cubic (fcc) metals and alloys. Here we systematically describe plausible dislocation interactions at twin boundaries. Depending on the characteristics of the dislocations and the driving stress, possible dislocation reactions at twin boundaries include cross-slip into the twinning plane to cause twin growth or de-twinning, formation of a sessile stair-rod dislocation at the twin boundary, and transmission across the twin boundary. The energy barriers for these dislocation reactions are described and compared. {\textcopyright} 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.",

keywords = "Dislocations, fcc, Interactions, Nanocrystalline materials, Twin boundaries, Dislocations, fcc, Interactions, Nanocrystalline materials, Twin boundaries, Dislocations, fcc, Interactions, Nanocrystalline materials, Twin boundaries",

author = "Zhu, {Y. T.} and Wu, {X. L.} and Liao, {X. Z.} and J. Narayan and Kecsk{\'e}s, {L. J.} and Mathaudhu, {S. N.}",

year = "2011",

month = jan,

doi = "10.1016/j.actamat.2010.10.028",

language = "English",

volume = "59",

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journal = "Acta Materialia",

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publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Dislocation-twin interactions in nanocrystalline fcc metals

AU - Zhu, Y. T.

AU - Wu, X. L.

AU - Liao, X. Z.

AU - Narayan, J.

AU - Kecskés, L. J.

AU - Mathaudhu, S. N.

PY - 2011/1

Y1 - 2011/1

N2 - Dislocation interaction with and accumulation at twin boundaries have been reported to significantly improve the strength and ductility of nanostructured face-centered cubic (fcc) metals and alloys. Here we systematically describe plausible dislocation interactions at twin boundaries. Depending on the characteristics of the dislocations and the driving stress, possible dislocation reactions at twin boundaries include cross-slip into the twinning plane to cause twin growth or de-twinning, formation of a sessile stair-rod dislocation at the twin boundary, and transmission across the twin boundary. The energy barriers for these dislocation reactions are described and compared. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

AB - Dislocation interaction with and accumulation at twin boundaries have been reported to significantly improve the strength and ductility of nanostructured face-centered cubic (fcc) metals and alloys. Here we systematically describe plausible dislocation interactions at twin boundaries. Depending on the characteristics of the dislocations and the driving stress, possible dislocation reactions at twin boundaries include cross-slip into the twinning plane to cause twin growth or de-twinning, formation of a sessile stair-rod dislocation at the twin boundary, and transmission across the twin boundary. The energy barriers for these dislocation reactions are described and compared. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

KW - Dislocations

KW - fcc

KW - Interactions

KW - Nanocrystalline materials

KW - Twin boundaries

KW - Dislocations

KW - fcc

KW - Interactions

KW - Nanocrystalline materials

KW - Twin boundaries

KW - Dislocations

KW - fcc

KW - Interactions

KW - Nanocrystalline materials

KW - Twin boundaries

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-78449238083&origin=recordpage

U2 - 10.1016/j.actamat.2010.10.028

DO - 10.1016/j.actamat.2010.10.028

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6454

VL - 59

SP - 812

EP - 821

JO - Acta Materialia

JF - Acta Materialia

IS - 2

ER -

Dislocation-twin interactions in nanocrystalline fcc metals

Abstract

Research Keywords

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