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|Title: ||Deformation crossover: from nano- to mesoscale|
|Authors: ||Cheng, S.|
Stoica, A. D.
Horton, J. A.
Liu, C. T.
Brown, D. W.
Liaw, P. K.
|Subjects: ||Grain size and shape|
|Issue Date: ||17-Jul-2009 |
|Publisher: ||American Physical Society|
|Citation: ||Physical review letters, 17 July 2009, v. 103, no. 3, 035502, p. 1-4.|
|Abstract: ||In situ synchrotron and neutron diffraction were used to study deformation mechanisms in Ni over a broad range of grain sizes. The experimental data show that unlike in coarse-grained metals, where the deformation is dominated by dislocation slip, plastic deformation in nanocrystalline Ni is mediated by grain-boundary activities, as evidenced by the lack of intergranular strain and texture development. For ultrafine-grained Ni, although dislocation slip is an active deformation mechanism, deformation twinning also plays an important role, whose propensity increases with the grain size.|
|Description: ||DOI: 10.1103/PhysRevLett.103.035502|
|Rights: ||Physical Review Letters © 2009 The American Physical Society. The Journal's web site is located at http://prl.aps.org/|
|Type: ||Journal/Magazine Article|
|ISSN: ||0031-9007 (print)|
|Appears in Collections:||ME Journal/Magazine Articles|
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