Výsledky vyhledávání - "John W. Cahn"

Thermodynamics of Cottrell atmospheres tested by atomistic simulations

Autor: John W. Cahn, Yuri Mishin

Publikováno v: Acta Materialia. 117:197-206

Solute atoms can segregate to elastically deformed lattice regions around a dislocation and form an equilibrium distribution called the Cottrell atmosphere. We compare two approaches to describe Cottrell atmospheres. In the Eshelby theory, the solid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4a57b4172c30b33ca0fe6f3eb84514df
https://doi.org/10.1016/j.actamat.2016.07.013

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An ordered metallic glass solid solution phase that grows from the melt like a crystal

Autor: Karena W. Chapman, Lyle E. Levine, Frédéric Mompiou, Peter J. Chupas, Judith K. Stalick, Gabrielle G. Long, Leonid A. Bendersky, John W. Cahn

Publikováno v: Acta Materialia
Acta Materialia, Elsevier, 2014, 62 (1), pp.58-68. ⟨10.1016/j.actamat.2013.08.063⟩
Acta Materialia, 2014, 62 (1), pp.58-68. ⟨10.1016/j.actamat.2013.08.063⟩

cited By 6; International audience; We report structural studies of an Al-Fe-Si glassy solid that is a solid solution phase in the classical thermodynamic sense. We demonstrate that it is neither a frozen melt nor nanocrystalline. The glass has a wel

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https://doi.org/10.1016/j.actamat.2013.08.063

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A celebration of the pioneering work on quasicrystals in France and the expansion of crystallography

Autor: John W. Cahn

Publikováno v: Comptes Rendus Physique. 15(1):e1-e5

The coincidence of a meeting at CECM/CNRS in 1985 to plan work on the newly discovered quasicrystals with a meeting at IHES on hyperspace crystallography greatly expanded crystallography and made France a major player in the opportunities provided by

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Reminiscences About a Chemistry Nobel Prize Won with Metallurgy: Comments on D. Shechtman and I. A. Blech; Metall. Trans. A, 1985, vol. 16A, pp. 1005–12

Autor: Ilan A. Blech, John W. Cahn, Denis Gratias

Publikováno v: Metallurgical and Materials Transactions A. 43:3411-3422

A paper, ‘‘The Microstructure of Rapidly Solidified Al6Mn,’’ [1] was submitted for publication in October 1984 by D. Shechtman and I. Blech to the Metallurgical Transactions A (now Metallurgical and Materials Transactions) after having been r

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https://doi.org/10.1007/s11661-012-1323-1

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Recrystallization initiated by low-temperature grain boundary motion coupled to stress

Autor: Yuri Mishin, John W. Cahn

Publikováno v: International Journal of Materials Research. 100:510-515

We propose a new mechanism of recrystallization of cold-deformed metals. During the cold deformation, some of the high-angle grain boundaries are moved by the applied stresses, producing low-curvature bulges and leaving almost defect-free regions beh

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https://doi.org/10.3139/146.110066

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Shape accommodation of a rotating embedded crystal via a new variational formulation

Autor: John W. Cahn, Jean E. Taylor

Publikováno v: Interfaces and Free Boundaries. :493-512

We use an expanded variational approach based on dissipation to study the motion of the boundary of a non-circular cylindrical, and thus essentially 2-dimensional, crystalline grain of arbitrary cross-section enclosed in another grain of the same mat

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https://doi.org/10.4171/ifb/174

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Metrics, measures, and parametrizations for grain boundaries: a dialog

Autor: John W. Cahn, Jean E. Taylor

Publikováno v: Journal of Materials Science. 41:7669-7674

Analysis of experimental data on grain boundaries (GBs) can involve putting data into angle “bins.” An example is Brandon’s classification: if rotation angle and axis are each within $$15^\circ/\sqrt{\Sigma}$$ of a perfect coincidence site latt

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https://doi.org/10.1007/s10853-006-0592-8

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Special grain boundaries based on local symmetries

Autor: Leonid A. Bendersky, John W. Cahn

Publikováno v: Journal of Materials Science. 41:7683-7690

We propose that, in large unit cell structures, the operation of local symmetries rather than a coincidence site lattice (CSL), is important for the creation of special, low energy, grain and twin boundaries. We illustrate this with a Durer tiling, a

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https://doi.org/10.1007/s10853-006-0625-3

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Coupling grain boundary motion to shear deformation

Autor: Yuri Mishin, John W. Cahn, Akira Suzuki

Publikováno v: Acta Materialia. 54:4953-4975

Molecular dynamics (MD) simulations confirm that normal grain boundary (GB) motion must often be coupled to tangential translation of grains and will then produce shear deformation of the lattice traversed by the GB. Conversely, shear stresses applie

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https://doi.org/10.1016/j.actamat.2006.08.004

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Duality of dislocation content of grain boundaries

Autor: John W. Cahn, Yuri Mishin, Akira Suzuki

Publikováno v: Philosophical Magazine. 86:3965-3980

The Frank–Bilby equation (FBE) can give many solutions for the dislocation content of a grain boundary (GB); most of them are considered to have little physical reality except in limited ranges of the angles which characterize low-angle GBs. We exp

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https://doi.org/10.1080/14786430500536909

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