Nanocrystalline structure of non-equilibrium FeCu alloys obtained by severe plastic deformation under pressure

Teplov, V. A.; Pilugin, V. P.; Гавико, В. С.

doi:10.1016/0965-9773(95)00090-9

Cited by 17 publications

(16 citation statements)

References 8 publications

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“…the supersaturated solid solution formed by Al resolving in the Mg matrix. During plastic deformation the high stresses up to 1/10G, where G is the shear modulus of the materials, originated from the grain boundaries [18,19]. The high stresses also exist in the volume of grain because relaxation of the stresses is impended by the lack of volume dislocations.…”

Section: Discussionmentioning

confidence: 99%

Nanocrystalline structure of magnesium alloys subjected to high energy shot peening

Hou

Wei

Shu

et al. 2010

Journal of Alloys and Compounds

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Section: Discussionmentioning

confidence: 99%

Nanocrystalline structure of magnesium alloys subjected to high energy shot peening

Hou

Wei

Shu

et al. 2010

Journal of Alloys and Compounds

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“…A particular cry stall ographic texture is formed in ECAP samples [248]. It has been demonstrated that ECAP can successfully produce numerous submicron-grained metallic materials including Ni [249], Cu [250,251], Fe-Cu alloy [252], Ti alloy [253], Al and its alloys [250,[254][255][256][257][258][259][260][261]. The submicronsized grains of Al and its alloys processed by ECAP are generally unstable at temperatures above $500 K except when the precipitates are present.…”

Section: Severe Plastic Deformationmentioning

confidence: 99%

Nanocrystalline materials and coatings

Tjong

Chen

2004

Materials Science and Engineering: R: Reports

837

345

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In recent years, near-nano (submicron) and nanostructured materials have attracted increasingly more attention from the materials community. Nanocrystalline materials are characterized by a microstructural length or grain size of up to about 100 nm. Materials having grain size of $0.1 to 0.3 mm are classified as submicron materials. Nanocrystalline materials exhibit various shapes or forms, and possess unique chemical, physical or mechanical properties. When the grain size is below a critical value ($10-20 nm), more than 50 vol.% of atoms is associated with grain boundaries or interfacial boundaries. In this respect, dislocation pile-ups cannot form, and the Hall-Petch relationship for conventional coarse-grained materials is no longer valid. Therefore, grain boundaries play a major role in the deformation of nanocrystalline materials. Nanocrystalline materials exhibit creep and super plasticity at lower temperatures than conventional micro-grained counterparts. Similarly, plastic deformation of nanocrystalline coatings is considered to be associated with grain boundary sliding assisted by grain boundary diffusion or rotation. In this review paper, current developments in fabrication, microstructure, physical and mechanical properties of nanocrystalline materials and coatings will be addressed. Particular attention is paid to the properties of transition metal nitride nanocrystalline films formed by ion beam assisted deposition process. #

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“…In recent times new methods have been developed and improved to obtain supersaturated solid solutions. For example, severe plastic deformation (SPD) by high-pressure torsion (HPT) deformation has been used to produce bulk, nanocrystalline (nc) solid solutions in a variety of binary Cu-based alloy systems with a positive heat of mixing (for instance: Cu-Fe, Cu-Cr, Cu-Co, Cu-W [4][5][6][7][8][9][10][11][12][13]) by extending the solid solubility level during deformation. As expected, these metastable solid solutions are not in the equilibrium state after HPT processing and during subsequent annealing treatments, decomposition of the metastable solid solutions is reported [4,9,10,12].…”

Section: Introductionmentioning

confidence: 99%

Phase separation of a supersaturated nanocrystalline Cu–Co alloy and its influence on thermal stability

et al. 2015

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The thermal decomposition behavior, the microstructural evolution and its influence on the mechanical properties of a supersaturated Cu-Co solid solution with ~100 nm average grain size prepared by severe plastic deformation is investigated under non-isothermal and isothermal annealing conditions. Pure fine-grained Cu and Co exhibit substantial grain growth upon annealing, whereas the Cu-Co alloy is thermally stable at the same annealing temperatures. The annealed microstructures are studied by independent characterization methods, including scanning electron microscopy, electron energy loss spectroscopy and atom probe tomography. The phase separation process in the Cu-Co alloy proceeds by the same mechanism, but on different length scales: a fine scaled spinodal-type decomposition is observed in the grain interior, simultaneously Co and Cu regions with a larger scale are formed near the grain boundary regions. Subsequent grain growth at higher annealing temperatures results in a microstructure consisting of the pure equilibrium phases. Such mechanisms can be used to tailor nano structures to optimize certain properties. Published in

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Nanocrystalline structure of non-equilibrium FeCu alloys obtained by severe plastic deformation under pressure

Cited by 17 publications

References 8 publications

Nanocrystalline structure of magnesium alloys subjected to high energy shot peening

Nanocrystalline structure of magnesium alloys subjected to high energy shot peening

Nanocrystalline materials and coatings

Phase separation of a supersaturated nanocrystalline Cu–Co alloy and its influence on thermal stability

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