Mechanical behavior of nanocrystalline metals
نویسندگان
چکیده
منابع مشابه
Toward a quantitative understanding of mechanical behavior of nanocrystalline metals
Focusing on nanocrystalline (nc) pure face-centered cubic metals, where systematic experimental data are available, this paper presents a brief overview of the recent progress made in improving mechanical properties of nc materials, and in quantitatively and mechanistically understanding the underlying mechanisms. The mechanical properties reviewed include strength, ductility, strain rate and t...
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Electrodeposition is a very important technology in the fabrication of micro-compo‐ nents for micro-electro-mechanical systems (MEMS) or integrated circuits. Evalua‐ tions of the materials used in these devices as 3D components should be conducted using micro-sized specimens due to the sample size effect on the practical use of the components. Nanocrystalline metals could be deposited using an ...
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In this paper, a self-consistent plasticity theory is proposed to model the mechanical behaviours of irradiated face-centred cubic nanocrystalline metals. At the grain level, a tensorial crystal model with both irradiation and grain size effects is applied for the grain interior (GI), whereas both grain boundary (GB) sliding with irradiation effect and GB diffusion are considered in modelling t...
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Free-standing nanocrystalline copper (Cu) films with grain size around 39 nm are fabricated by thermal evaporation and characterized by the plane-strain bulge test. Young’s modulus and yield stress at a 0.2% offset are about 110 ~ 130 GPa and 400 MPa, respectively. Results show that no grain growth is observed and the predominant plastic deformation mechanism is grain boundary sliding accompani...
متن کاملAtomistic mechanisms of fatigue in nanocrystalline metals.
We investigate the mechanisms of fatigue behavior in nanocrystalline metals at the atomic scale using empirical force laws and molecular level simulations. A combination of molecular statics and molecular dynamics was used to deal with the time scale limitations of molecular dynamics. We show that the main atomistic mechanism of fatigue crack propagation in these materials is the formation of n...
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ژورنال
عنوان ژورنال: Nanostructured Materials
سال: 1992
ISSN: 0965-9773
DOI: 10.1016/0965-9773(92)90074-8