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http://hdl.handle.net/10397/4868
| 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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|---|---|---|---|---|
| Cheng_Deformation_Nano-_Mesoscale.pdf | 718.77 kB | Adobe PDF | View/Open |
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