Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4868
Title: Deformation crossover : from nano- to mesoscale
Authors: Cheng, S.
Stoica, A. D.
Wang, X.-L.
Ren, Y.
Almer, J.
Horton, J. A.
Liu, C. T.
Clausen, B.
Brown, D. W.
Liaw, P. K.
Zuo, L.
Subjects: Grain size and shape
Nickel
Textures
Issue Date: 17-Jul-2009
Publisher: American Physical Society
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.
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
URI: http://hdl.handle.net/10397/4868
DOI: 10.1103/PhysRevLett.103.035502
ISSN: 0031-9007 (print)
1079-7114 (online)
Appears in Collections:ME Journal/Magazine Articles

Files in This Item:
File Description SizeFormat 
Cheng_Deformation_Nano-_Mesoscale.pdf718.77 kBAdobe PDFView/Open


All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated. No item in the PolyU IR may be reproduced for commercial or resale purposes.