Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4868
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Title: Deformation crossover : from nano- to mesoscale
Authors: Cheng, S
Stoica, AD
Wang, X
Ren, Y
Almer, J
Horton, JA
Liu, CT
Clausen, B
Brown, DW
Liaw, PK
Zuo, L
Issue Date: 17-Jul-2009
Source: 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.
Keywords: Grain size and shape
Nickel
Textures
Publisher: American Physical Society
Journal: Physical review letters 
ISSN: 0031-9007
EISSN: 1079-7114
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/
Appears in Collections:Journal/Magazine Article

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