Journal ArticleDOI
Failure mode and dynamic behavior of nanophase iron under compression
D Jia,K.T. Ramesh,Evan Ma +2 more
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TLDR
In this paper, the authors report on the compressive deformation behavior and failure mode of near full-density (99.2% of theoretical density) elemental Fe with an average grain size of 80 nm.About:
This article is published in Scripta Materialia.The article was published on 1999-12-17. It has received 105 citations till now. The article focuses on the topics: Strain hardening exponent & Strain rate.read more
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Mechanical properties of nanocrystalline materials
TL;DR: The mechanical properties of nanocrystalline materials are reviewed in this paper, with emphasis on their constitutive response and on the fundamental physical mechanisms, including the deviation from the Hall-Petch slope and possible negative slope, the effect of porosity, the difference between tensile and compressive strength, the limited ductility, the tendency for shear localization, fatigue and creep responses.
Journal ArticleDOI
Nanocrystalline materials and coatings
Sie Chin Tjong,Haydn Chen +1 more
TL;DR: In this paper, a review of the current developments in fabrication, microstructure, physical and mechanical properties of nanocrystalline materials and coatings is addressed. And the properties of transition metal nitride nanocrystine films formed by ion beam assisted deposition process.
Journal ArticleDOI
Effect of nanocrystalline and ultrafine grain sizes on the strain rate sensitivity and activation volume: fcc versus bcc metals
TL;DR: In this paper, the authors present experimental results from their in-house tests on UFG Cu, Fe and Ta, along with those available in literature, regarding the behavior of SRS and activation volume of UFG/nc metals with face-centered cubic (fcc) and bodycentered cubic structures.
Journal ArticleDOI
Novel Ti-base nanostructure-dendrite composite with enhanced plasticity.
TL;DR: This work presents a new in situ-formed nanostructured matrix/ductile dendritic phase composite microstructure for Ti-base alloys, which exhibits up to 14.5% compressive plastic strain at room temperature.
Journal ArticleDOI
Nanocrystalline electrodeposited Ni: microstructure and tensile properties
TL;DR: In this article, the microstructure of commercially available nanocrystalline (nc) electroplated Ni foils is studied by means of Xray diffraction and transmission electron microscopy.
References
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Journal ArticleDOI
Softening of nanocrystalline metals at very small grain sizes
TL;DR: In this paper, the deformation of nanocrystalline copper has been studied and it is shown that the hardness and yield stress of the material typically increase with decreasing grain size, a phenomenon known as the reverse Hall-Petch effect.
Journal ArticleDOI
Structural and thermodynamic properties of nanocrystalline fcc metals prepared by mechanical attrition
TL;DR: In this article, the deformation process causes a decrease of the grain size of the fcc metals to 6-22 nm for the different elements, and the final grain size scales with the melting point and the bulk modulus of the respective metal.
Journal ArticleDOI
Structure and Mechanical Behavior of Bulk Nanocrystalline Materials
J. R Weertman,Diana Farkas,Kevin J. Hemker,Harriet Kung,Merrilea Mayo,Rahul Mitra,H. Van Swygenhoven +6 more
TL;DR: In this paper, the Hall-Petch equation was used to explain the deformation of very fine-grained nanocrystalline materials with grain sizes ranging from 3.4 nm to 12 nm.
Journal ArticleDOI
Mechanical behavior of a bulk nanostructured iron alloy
TL;DR: In this article, the Hall-Petch equation was used to model the behavior of fine-grained Fe-10Cu powders with grain diameters between 45 nm and 1.7 µm.
Related Papers (5)
Effects of nanocrystalline and ultrafine grain sizes on constitutive behavior and shear bands in iron
D. Jia,K.T. Ramesh,Evan Ma +2 more