Plastic deformation of submicron-sized crystals studied by in-situ Kikuchi diffraction and dislocation imaging

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Plastic deformation of submicron-sized crystals studied by in-situ Kikuchi diffraction and dislocation imaging. / Zhang, Xiaodan; Godfrey, Andrew; Winther, Grethe; Hansen, Niels; Huang, Xiaoxu.

In: Materials Characterization, Vol. 70, 2012, p. 21-27.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Zhang, Xiaodan; Godfrey, Andrew; Winther, Grethe; Hansen, Niels; Huang, Xiaoxu / Plastic deformation of submicron-sized crystals studied by in-situ Kikuchi diffraction and dislocation imaging.

In: Materials Characterization, Vol. 70, 2012, p. 21-27.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{812871d339cd4d07affe0d1843539799,
title = "Plastic deformation of submicron-sized crystals studied by in-situ Kikuchi diffraction and dislocation imaging",
keywords = "Plastic deformation, Submicron-sized crystals, In-situ convergent beam electron, Kikuchi diffraction, Dislocation imaging, Crystal rotation",
publisher = "Elsevier Inc.",
author = "Xiaodan Zhang and Andrew Godfrey and Grethe Winther and Niels Hansen and Xiaoxu Huang",
year = "2012",
doi = "10.1016/j.matchar.2012.04.019",
volume = "70",
pages = "21--27",
journal = "Materials Characterization",
issn = "1044-5803",

}

RIS

TY - JOUR

T1 - Plastic deformation of submicron-sized crystals studied by in-situ Kikuchi diffraction and dislocation imaging

A1 - Zhang,Xiaodan

A1 - Godfrey,Andrew

A1 - Winther,Grethe

A1 - Hansen,Niels

A1 - Huang,Xiaoxu

AU - Zhang,Xiaodan

AU - Godfrey,Andrew

AU - Winther,Grethe

AU - Hansen,Niels

AU - Huang,Xiaoxu

PB - Elsevier Inc.

PY - 2012

Y1 - 2012

N2 - The plastic deformation of submicron-size copper single crystals in the form of pillars has been characterized during in-situ compression in the transmission electron microscope up to strains of 28–33% using a state-of-the-art holder (PI-95 PicoIndenter). The dimensions of the crystals used were approx. 500×250×200 nm3 with the compression axis oriented 1.6° from [110]. Local crystallographic orientations have been determined with high accuracy using a Kikuchi diffraction method and glide of dislocations over a pillar has also been <br/>observed directly by dark field imaging. The variation in the local orientation during deformation has been followed by in-situ convergent beam electron Kikuchi diffraction. The in-situ observations have been followed up by post-deformation measurements with the samples still mounted in the electron microscope. Crystal breakup following localized deformation was observed in two of three crystals examined, and for all crystals the direction of rotation during deformation is in agreement with slip taking place on a subset <br/>of the four slip systems, with the highest Schmid factors on the (111) and (−1–11) slip planes. A diffraction-based Burgers vector analysis confirms that the active dislocations are from slip systems with the highest Schmid factors. These results from testing of micropillars are in good agreement with the deformation behaviour previously reported for both single- and poly-crystal samples with dimensions in the millimetre range. © 2012 Elsevier Inc. All rights reserved.

AB - The plastic deformation of submicron-size copper single crystals in the form of pillars has been characterized during in-situ compression in the transmission electron microscope up to strains of 28–33% using a state-of-the-art holder (PI-95 PicoIndenter). The dimensions of the crystals used were approx. 500×250×200 nm3 with the compression axis oriented 1.6° from [110]. Local crystallographic orientations have been determined with high accuracy using a Kikuchi diffraction method and glide of dislocations over a pillar has also been <br/>observed directly by dark field imaging. The variation in the local orientation during deformation has been followed by in-situ convergent beam electron Kikuchi diffraction. The in-situ observations have been followed up by post-deformation measurements with the samples still mounted in the electron microscope. Crystal breakup following localized deformation was observed in two of three crystals examined, and for all crystals the direction of rotation during deformation is in agreement with slip taking place on a subset <br/>of the four slip systems, with the highest Schmid factors on the (111) and (−1–11) slip planes. A diffraction-based Burgers vector analysis confirms that the active dislocations are from slip systems with the highest Schmid factors. These results from testing of micropillars are in good agreement with the deformation behaviour previously reported for both single- and poly-crystal samples with dimensions in the millimetre range. © 2012 Elsevier Inc. All rights reserved.

KW - Plastic deformation

KW - Submicron-sized crystals

KW - In-situ convergent beam electron

KW - Kikuchi diffraction

KW - Dislocation imaging

KW - Crystal rotation

U2 - 10.1016/j.matchar.2012.04.019

DO - 10.1016/j.matchar.2012.04.019

JO - Materials Characterization

JF - Materials Characterization

SN - 1044-5803

VL - 70

SP - 21

EP - 27

ER -