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Thursday, July 30, 2020 | History

4 edition of Anisotropy of interfaces in an ordered HCP binary alloy found in the catalog.

Anisotropy of interfaces in an ordered HCP binary alloy

Anisotropy of interfaces in an ordered HCP binary alloy

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  • 16 Currently reading

Published by U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology in Gaithersburg, MD .
Written in English

    Subjects:
  • Anisotropy,
  • Binary systems (Metallurgy),
  • Mean field theory

  • Edition Notes

    StatementJ.W. Cahn, S.C. Han, G.B. McFadden
    SeriesNISTIR -- 6217
    ContributionsHan, S. C, McFadden, Geoffrey B, National Institute of Standards and Technology (U.S.)
    The Physical Object
    FormatMicroform
    Pagination27 p.
    Number of Pages27
    ID Numbers
    Open LibraryOL13625514M
    OCLC/WorldCa41880440

    The anisotropy of surface energy is referred to the close packed plane of the hcp lattice structure, analogous to that of the fcc lattice struct i.e. α = E s u r f {h k i l} / E s u r f {}. Meanwhile, relevant calculations associated with the position of solute atoms in the supercell were performed to confirm the validity of solid Cited by: NOTE: Continuation of "New Insights on Solid-Liquid Interface Anisotropy Effects on Solidification Patterns of Pure and Alloy Systems in Microgravity," grant 80NSSC18K, when Principal Investigator was affiliated with Missouri University of Science and Technology.

    Controlled lateral anisotropy in correlated manganite heterostructures by interface-engineered oxygen octahedral coupling Z. Liao1, M. Huijben1*, Z charge and spin order are intimately correlated to the BO 6 oxygen octahedra In the bulk, the oxygen octahedral rotation (OOR) and interface structure of LSMO indicates that the local.   Strength of Metals and Alloys, Volume 1 covers the proceedings of the Seventh International Conference on the Strength of Metals and Alloys. The book presents papers that discuss the properties of various metals and alloys. The text contains studies, which are grouped into six Book Edition: 1.

      In the last decades, the class of Ti-rich TiAl-based intermetallic materials has replaced many contemporary alloys till °C. Due to higher oxidation resistance, 20% lower density and higher (about °C more) operating temperature possibility of Al-rich TiAl alloys over Ti-rich side, phases from the Al-rich region of this alloy system are considered to be highly potential candidates for Author: Helal Chowdhury, Holm Altenbach, Manja Krüger, Konstantin Naumenko. The HCP to BCC Phase Transformation in Ti Characterized by Nanosecond Electron Microscopy In-Situ HRTEM Study of a Diffuse Interface in Au-Cu Alloy. Gautam, A. R. S. / Raffler, N. / Howe, J. M Generalized Ginzburg-Landau Theory of Antiphase and Interphase Boundaries for the B2-Type and L1~0-Type Alloy Order. Khromov, K. Y. / Pankratov.


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Anisotropy of interfaces in an ordered HCP binary alloy Download PDF EPUB FB2

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): A multiple-order-parameter mean field theory of ordering on a binary hexagonalclose -packed (HCP) crystal structure is developed, and adapted to provide a continuum formulation that incorporates the underlying symmetries of the HCP crystal in both the bulk and gradient energy terms of the free energy.

Get this from a library. Anisotropy of interfaces in an ordered HCP binary alloy. [J W Cahn; S C Han; Geoffrey B McFadden; National Institute of Standards and Technology (U.S.)].

The structure of these interfaces compares favourably with previous lattice calculations by Kikuchi & Cahn (, ). Anisotropy is a natural consequence of the lattice calculation and the multiple-order-parameter continuum formulation presented by: Anisotropy of Interfaces in an Ordered HCP Binary Alloy.

As in the corresponding FCC case, the multiple order parameters do not form a vector. Anisotropy is a natural consequence of the underlying crystal symmetries and the multiple-order-parameter continuum formation presented here.

The isotropy transverse to the : J.W. Cahn, S. Han and G.B. McFadden. In this work, we chose three random hcp systems as case studies, namely, a binary Co 85 Ni 15 alloy, a ternary Co 84 Fe 8 Ni 8 alloy, and a binary Os 50 Ru 50 alloy.

The first one represents a stable phase of the binary Co–Ni system for temperatures around room temperature [ 37 ], the second one is a hypothetical alloy isoelectronic with pure Author: Wagenknecht D, Turek I. Zheng investigated the solid-liquid interfaces for the B2 NiAl ordered alloy system, and the interface widths based on the coarse-grained density profiles are calculated to be ± Å for (1 0 0), ± Å for (1 1 0) and ± Å for (1 1 1), respectively.

Close examination suggests that the interface width is dominated by the interlayer spacing of the underlying solids: the largest width is Cited by: 9.

As mentioned above, the MAE of hcp Co and its alloy films is considerably influenced by the lattice strain and can be enhanced to ~10 6 J m −3 which is comparable to the MAE of some ordered alloys, such as L1 0 FePt etc, even in the absence of the obvious long-range anisotropic chemical ordering found in evaporated Co–Pt films [10, 29, 30 Cited by: 7.

Both synchrotron X-ray tomography and EBSD characterization revealed that the preferred growth directions of magnesium alloy dendrite change as the type and amount of solute elemeCited by: A model for binary alloy dendrite growth with thermal anisotropy is developed.

Anisotropy departure source term is used to specify deviation from isotropic model. Significant effect of thermal anisotropy on grain growth and morphology is by: 2. Michael J. Richards and John W. Cahn, "Pairwise Interactions and the Ground State of Ordered Binary Alloys," Acta Met. 19, ().

Samuel M. Allen and John W. Cahn, "Ground State Structures in Ordered Binary Alloys with Second Neighbor Interactions," Acta Met. 20, (). 2 In our recent paper we considered structures of simple metals based on the bcc structure with distortions, vacancies and superstructures [13].

The subject of the present paper is hcp and derivative structures in simple metals and binary phases formed by sp elements. Consideration of sp (non-transition) metals gives well-defined value of the valence electron count per atom in a phase to.

The anisotropy in room temperature plastic deformation has been investigated in single α(HCP)/β(BCC) colonies of a commercial α/β titanium alloy (Ti-6Al-2Sn-4Zr-2MoSi) oriented for. Cellular and dendritic growth of HCP Zn-Cd alloys is strongly influenced by crystalline anisotropy, being fundamental in the fixing of the operative conditions during dendritic growth, and takes a.

1 Strong perpendicular magnetic anisotropy energy density at Fe alloy/HfO 2 interfaces Yongxi Ou1*, D. Ralph1,2, and R. Buhrman1+ 1Cornell University, Ithaca, New YorkUSA 2Kavli Institute at Cornell, Ithaca, New YorkUSA *[email protected], [email protected] ABSTRACT.

J.W. Cahn, S.C. Han, G.B. McFadden, Anisotropy of Interfaces in an Ordered HCP Binary Alloy, J. Stat. Phys. 95 () – R.D. Ramdan, T. Takaki, K. Yashiro, Y. Tomita, The Effects of Structure Orientation on the Growth of Fe2B Boride by Multi-Phase-Field Simulation, Mater.

Trans. 51 Author: Raden Dadan Ramdan, Tomohiro Takaki, Joy Rizki Pangestu Djuansjah, Bondan Tiara Sofyan, Esah Hamzah. The in-plane mechanical anisotropy of magnesium alloy sheet, which significantly influences the design of the parts produced by Mg alloy sheets, is of great importance regarding its wide application.

Though the stress–strain response and texture evolution have been intensively investigated, and the anisotropy of Mg alloy can be significantly substantiated by its R-value, which reveals the Author: Bo Zhang, Shuangming Li, Huamiao Wang, Weiqin Tang, Yaodong Jiang, Peidong Wu.

anisotropy results in increasing the intrinsic anisotropy field, HK, and consequently the coercive field, 1-l, making it difficult to write magnetic information. It is important to determine the optimum anisotropy field and resulting coercivity, considering both the issues of.

Anisotropy of interfacial energy or interface kinetics in a crystalline phase contributes to form an ordered pattern with a unique characteristic length scale rather than a fractal pattern. The key ingredients in pattern formation during solidification thus are contributions of diffusion field, interfacial energy and crystalline anisotropy [ 2 ].Cited by: 3.

MODELS OF PATTERN FORMATION IN FIRST-ORDER PHASE TRANSITIONS. Langer; each pertaining to the special class of situations in which patterns are formed during first-order phase transformations.

The first of these models is the basic thermodynamic description of a solidifying system controlled by thermal diffusion and interfacial. For the sustainable development of spintronic devices, a half-metallic ferromagnetic film needs to be developed as a spin source with exhibiting % spin polarisation at its Fermi level at room temperature.

One of the most promising candidates for such a film is a Heusler-alloy film, which has already been proven to achieve the half-metallicity in the bulk region of the by: 6. The magnetic and structural properties of highly chemically ordered epitaxial (Fe 1-x Mn x) 50 Pt 50 L1 0 (0lesxles) thin films are investigated.

Highly chemically ordered (Fe 1-x Mn x) 50 Pt 50 (0lesxles) is deposited epitaxially on MgO () substrates at degC by magnetron co-sputtering from two alloy targets. The epitaxial quality, degree of chemical ordering, and lattice constants.

S. Yi, J. Bohlen, F. Heinman, D. Letzig, Mechanical anisotropy and deep drawing behaviour of AZ31 and ZE10 magnesium alloy sheets. Acta Materialia, 58(2): p Author: Wahaz Nasim, Joshua S. Herrington, Amine A. Benzerga, Jyhwen Wang, Ibrahim Karaman.This thesis developed and validated laser ultrasonics as an in-situ monitor of phase transformations in commercially pure titanium and Ti - 5 wt.% Al - 5 wt.% Mo - 5 wt.% V - 3 wt.% Cr (Ti).

Three studies (Chapters 5, 6 and 7) were performed to achieve this goal. The first study involved using finite element modeling (FEM) to simulate wave propagation through a 2-phase aggregate to Author: Alyssa Shinbine.