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Erschienen in:
2004 | OriginalPaper | Buchkapitel
Yield Stress of Nanocrystalline Materials
verfasst von : Dr. Mikhail Yu. Gutkin, Prof. Ilya A. Ovid’ko
Erschienen in: Plastic Deformation in Nanocrystalline Materials
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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Most mechanical properties of nanocrystalline materials (NCMs) are essentially different from those of conventional coarse-grained polycrystals. NCMs exhibit extremely high strength and good fatigue resistance [224–226], as desired for numerous applications. Most NCMs show low tensile ductility which limits their practical utility. At the same time, several examples of substantial ductility and even superplasticity have been reported. In particular, nanocrystalline ceramics commonly exhibit superplasticity at lower temperatures and faster strain rates than their coarse-grained counterparts [227, 228].