Twinning and stacking fault formation during tensile deformation of nanocrystalline Ni
نویسندگان
چکیده
منابع مشابه
Deformation twinning in nanocrystalline materials
Nanocrystalline (nc) materials can be defined as solids with grain sizes in the range of 1–100 nm. Contrary to coarse-grained metals, which become more difficult to twin with decreasing grain size, nanocrystalline face-centered-cubic (fcc) metals become easier to twin with decreasing grain size, reaching a maximum twinning probability, and then become more difficult to twin when the grain size ...
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Inverse grain-size effect on twinning in nanocrystalline Ni.
A long-standing controversy exists between molecular dynamics simulations and experiments on the twinning propensity of nanocrystalline (NC) face-centered-cubic metals. For example, three-dimensional molecular dynamics simulations rarely observed twins in NC Ni, whereas experiments readily observed them. Here this discrepancy is resolved by experimental observation of an inverse grain-size effe...
متن کاملNew deformation twinning mechanism generates zero macroscopic strain in nanocrystalline metals.
Macroscopic strain was hitherto considered a necessary corollary of deformation twinning in coarse-grained metals. Recently, twinning has been found to be a preeminent deformation mechanism in nanocrystalline face-centered-cubic (fcc) metals with medium-to-high stacking fault energies. Here we report a surprising discovery that the vast majority of deformation twins in nanocrystalline Al, Ni, a...
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ژورنال
عنوان ژورنال: Scripta Materialia
سال: 2006
ISSN: 1359-6462
DOI: 10.1016/j.scriptamat.2005.12.045