In situ atomic-scale observation of continuous and reversible lattice deformation beyond the elastic limit

Lihua Wang; Pan Liu; Pengfei Guan; Mingjie Yang; Jialin Sun; Yongqiang Cheng; Akihiko Hirata; Ze Zhang; Ma Evan; Mingwei Chen; Xiaodong Han

doi:10.1038/ncomms3413

In situ atomic-scale observation of continuous and reversible lattice deformation beyond the elastic limit

Lihua Wang, Pan Liu, Pengfei Guan, Mingjie Yang, Jialin Sun, Yongqiang Cheng, Akihiko Hirata, Ze Zhang, Ma Evan, Mingwei Chen, Xiaodong Han

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

158 Scopus citations

Abstract

The elastic strain sustainable in crystal lattices is usually limited by the onset of inelastic yielding mediated by discrete dislocation activity, displacive deformation twinning and stress-induced phase transformations, or fracture associated with flaws. Here we report a continuous and gradual lattice deformation in bending nickel nanowires to a reversible shear strain as high as 34.6%, which is approximately four times that of the theoretical elastic strain limit for unconstrained loading. The functioning deformation mechanism was revealed on the atomic scale by an in situ nanowire bending experiments inside a transmission electron microscope. The complete continuous lattice straining process of crystals has been witnessed in its entirety for the straining path, which starts from the face-centred cubic lattice, transitions through the orthogonal path to reach a body-centred tetragonal structure and finally to a re-oriented face-centred cubic structure.

Original language	English
Article number	2413
Journal	Nature Communications
Volume	4
DOIs	https://doi.org/10.1038/ncomms3413
State	Published - 2013
Externally published	Yes

Funding

This work was supported by the National Natural Science Foundation (11127404, 11234011 and 11174172), the National 973 Program of China (2009CB623700), the Beijing PXM201101420409000053 and the National and Beijing 211 Project. Y.Q. and E.M. were supported at JHU by Materials Sciences and Engineering Division, Office of Basic Energy Sciences (BES), US Department of Energy (DOE, DE-FG02-09ER46056). P.F.G, A.H. and M.W.C. were sponsored by ‘World Premier International (WPI) Research Center Initiative for Atoms, Molecules and Materials’, MEXT, Japan.

Funders	Funder number
U.S. Department of Energy	DE-FG02-09ER46056
Basic Energy Sciences
Johns Hopkins University
National Natural Science Foundation of China	11127404, 11174172, 11234011
National Key Research and Development Program of China	2009CB623700, PXM201101420409000053

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title = "In situ atomic-scale observation of continuous and reversible lattice deformation beyond the elastic limit",

abstract = "The elastic strain sustainable in crystal lattices is usually limited by the onset of inelastic yielding mediated by discrete dislocation activity, displacive deformation twinning and stress-induced phase transformations, or fracture associated with flaws. Here we report a continuous and gradual lattice deformation in bending nickel nanowires to a reversible shear strain as high as 34.6%, which is approximately four times that of the theoretical elastic strain limit for unconstrained loading. The functioning deformation mechanism was revealed on the atomic scale by an in situ nanowire bending experiments inside a transmission electron microscope. The complete continuous lattice straining process of crystals has been witnessed in its entirety for the straining path, which starts from the face-centred cubic lattice, transitions through the orthogonal path to reach a body-centred tetragonal structure and finally to a re-oriented face-centred cubic structure.",

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T1 - In situ atomic-scale observation of continuous and reversible lattice deformation beyond the elastic limit

AU - Wang, Lihua

AU - Liu, Pan

AU - Guan, Pengfei

AU - Yang, Mingjie

AU - Sun, Jialin

AU - Cheng, Yongqiang

AU - Hirata, Akihiko

AU - Zhang, Ze

AU - Evan, Ma

AU - Chen, Mingwei

AU - Han, Xiaodong

PY - 2013

Y1 - 2013

N2 - The elastic strain sustainable in crystal lattices is usually limited by the onset of inelastic yielding mediated by discrete dislocation activity, displacive deformation twinning and stress-induced phase transformations, or fracture associated with flaws. Here we report a continuous and gradual lattice deformation in bending nickel nanowires to a reversible shear strain as high as 34.6%, which is approximately four times that of the theoretical elastic strain limit for unconstrained loading. The functioning deformation mechanism was revealed on the atomic scale by an in situ nanowire bending experiments inside a transmission electron microscope. The complete continuous lattice straining process of crystals has been witnessed in its entirety for the straining path, which starts from the face-centred cubic lattice, transitions through the orthogonal path to reach a body-centred tetragonal structure and finally to a re-oriented face-centred cubic structure.

AB - The elastic strain sustainable in crystal lattices is usually limited by the onset of inelastic yielding mediated by discrete dislocation activity, displacive deformation twinning and stress-induced phase transformations, or fracture associated with flaws. Here we report a continuous and gradual lattice deformation in bending nickel nanowires to a reversible shear strain as high as 34.6%, which is approximately four times that of the theoretical elastic strain limit for unconstrained loading. The functioning deformation mechanism was revealed on the atomic scale by an in situ nanowire bending experiments inside a transmission electron microscope. The complete continuous lattice straining process of crystals has been witnessed in its entirety for the straining path, which starts from the face-centred cubic lattice, transitions through the orthogonal path to reach a body-centred tetragonal structure and finally to a re-oriented face-centred cubic structure.

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In situ atomic-scale observation of continuous and reversible lattice deformation beyond the elastic limit

Abstract

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