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3 edition of Undercooled alloy phases found in the catalog.

Undercooled alloy phases

Hume-Rothery Memorial Symposium (1986 New Orleans, La.)

Undercooled alloy phases

proceedings of the 1986 Hume-Rothery Memorial Symposium which was organized by the TMS Committee on Alloy Phases, and was held in New Orleans, Louisiana, March 2-6, 1986 at the 115th annual meeting of TMS-AIME

by Hume-Rothery Memorial Symposium (1986 New Orleans, La.)

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Published by Metallurgical Society in Warrendale, Pa .
Written in English

    Subjects:
  • Alloys -- Congresses.,
  • Phase rule and equilibrium -- Congresses.,
  • Supercooling -- Congresses.

  • Edition Notes

    Includes bibliographies and indexes.

    Statementedited by E.W. Collings, C.C. Koch.
    ContributionsCollings, E. W., Koch, C. C., Metallurgical Society of AIME. Alloy Phases Committee., Metallurgical Society of AIME. Meeting.
    Classifications
    LC ClassificationsTN689.2 .H86 1986
    The Physical Object
    Paginationx, 503 p. :
    Number of Pages503
    ID Numbers
    Open LibraryOL20927814M
    ISBN 100873390598

    Rapid growth of (αFe) dendrites is a crucial dynamic solidification behavior during rapid solidification of the undercooled alloy. The melting of (αFe) and Fe 7 Mo 3 phases in the heating process of the alloy causes two endothermic events as revealed by the DSC measurement (see the inset of Fig. 1). Accordingly, experimental data for the Cited by: The forming mechanism of metastable phase in undercooled Fe-Co alloy was concluded as cooperative effect of “competitive nucleation—remelting—extensive growth—incomplete solid-state transformation” in this work. With the increase of annealing time, the number and dimension of metastable phase decreased at the same time. @article{osti_, title = {Single-phase solidification during rapid resolidification of stainless steel alloys}, author = {Elmer, J W and Eager, T W and Allen, S M}, abstractNote = {The relative fractions of ferrite and austenite that solidify from a stainless steel (SS) alloy depend on the alloy composition and the solidification rate. Results. The microstructure of near eutectic Co 76 Sn 24 alloy solidified without magnetic field at low undercooling close to its melting point is shown in Fig. alloy composition, Co 76 Sn 24 (at. %), is shown to be hypereutectic in Co-Sn binary phase diag but determined to be the eutectic point by Liu and Li et al. According to Fig. 1, this composition is very close to the Cited by:


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Undercooled alloy phases by Hume-Rothery Memorial Symposium (1986 New Orleans, La.) Download PDF EPUB FB2

Phase selection of undercooled solidification of Ni– wt% B alloy Junfeng Xu and Feng Liua) Department of Metal Material Engineering, School of Materials and Chemical Engineering, Xi’an Technological University, Xi’anPeople’s Republic of China; and State Key Laboratory of Solidification Processing.

Get this from a library. Undercooled alloy phases: proceedings of the Hume-Rothery Memorial Symposium which was organized by the TMS Committee on Alloy Undercooled alloy phases book, and was held in New Orleans, Louisiana, Marchat the th annual meeting of TMS-AIME. [E W Collings; C C Koch; TMS Committee Undercooled alloy phases book Alloy Phases.; Metallurgical Society of AIME.

Undercooled alloy phases. The Metallurgical Society of AIME, New Orleans, Louisiana, March 2–6, p Abbaschian GJ, Flemings MC () Metall Trans A 14A [Show full abstract] hypomonotectic melt, α(Cu) nucleates first, whole solidification course follows the mode of the undercooled single-phase alloy melts, and the structures undergo the.

Both nucleation and growth competition behavior involving competing phases in the undercooled hypoperitectic Ti 47 Al 53 alloy were systematically explored by undercooling technique, with an effort to make the nonequilibrium peritectic reaction mechanism clear.

The alloy was cyclically superheated in a containerless electromagnetic levitation Undercooled alloy phases book to arrive at the Cited by: 5.

Gibbs free energy difference between the Undercooled alloy phases book liquid and the p phase of a Ti-Cr alloy K. Undercooled alloy phases book and E. Trinh Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California J. Holzer and W. Johnson. Droplets of molten alloys of composition Ge12Sb88, AgInSbTe, Ge4Sb1Te5, and Ge2Sb2Te5, used for optical Undercooled alloy phases book storage, surrounded by a molten dehydrated B2O3 flux were undercooled Cited by: Lithium metal batteries are vital devices for high-energy-density energy storage, but the Li metal anode is highly reactive with electrolyte and forms uncontrolled dendrite that can cause undesirable parasitic reactions and, thus, poor cycling stability and raise safety concerns.

Despite remarkable progress to partially solve these issues, the Li metal still plates at the. Consider a eutectic dendrite consisting of two lamellar phases α and β, and growing in the undercooled melt with a constant velocity V and a dendrite tip radius the solid–liquid interface the lamellae are perpendicular to the dendritic contour so Cited by: L.M., in Encyclopedia of Materials: Science and Technology, 4 Dendrite Formation in Pure Metals.

There can be no Undercooled alloy phases book undercooling in a pure melt, since there is no solute rejection. Dendrites can form only in a thermally undercooled melt, which can occur when the melt is poured into a cold mold, in which case growth occurs into a negative gradient, as for equiaxed alloy.

Evidence for the transition from primary to peritectic phase growth during solidification of undercooled Ni-Zr alloy levitated by electromagnetic field.

Sci. Rep. 6, ; doi: /srep Cited by: 7. DEASA is an excellent undercooled alloy, of which the crystallographic behavior is same to alloy treated with electric field at high temperature and rapid cooling rate during solidification.

This inference has been evidenced in present and previous studies [ 14, 15, 49 ].Cited by: 3. Solidification velocity of undercooled FeeCo alloys Justin E. Rodriguez a, *, Carolina Kreischer b, parameter, Vo, is constant for a given phase within an alloy Undercooled alloy phases book if DHf =T m 2 does not vary significantly within the system, or within the composition range of interest.

Undercooled alloy phases book of the solid phases through undercooled liquid. The measured ve. The unified description of the overall solidification microstructure development in undercooled Fe-Ni alloys that has been developed indicates that in both bulk samples and powders a b.c.c.

phase develops from the melt when sufficient under- cooling is available to place the melt below the meta- stable b.c.c, phase boundary upon by:   Solidification of undercooled Ni– Undercooled alloy phases book B alloy melt was investigated by glass fluxing and cyclic superheating. A maximum melt undercooling up to Δ T p = K has been achieved.

If ∆T p phase sizes and fractions depend on ∆ T by: 3. Fe-Co single-phase alloy melts with different Co contents were undercooled using fluxing method. The maximum undercooling DT = K (relative undercooling DT/Tm=) was achieved in this work.

Phase selection during solidification of undercooled Ni Si eutectic alloy Article (PDF Available) in Progress in Natural Science 19(11) November with 88 Reads.

The solidification microstructure evolution of undercooled Cu wt.% Fe alloy melt was studied in this study by the combined method of glass fluxing and overheating. The liquidus and peritectic reaction temperatures of Cu wt.% Fe were experimentally obtained, and the obtained results were consistent with the previous by: 1.

Solidification is therefore one of the most important phase transformation in daily human life. Solidification is the transition from liquid to solid state of matter. The conditions under which material is transformed determines the physical and.

Meanwhile, the dendritic growth velocities of α-Ni and β-Ni 3 Si phases in undercooled Ni 4 at% eutectic alloy melt have also been calculated in the light of LKT dendritic growth theory.

In the small undercooling range of TCited by: 4. Microstructure evolution mechanisms of undercooled Ni 80 Cu 20 alloys were systematically studied, and two types of grain refinement were observed in the as-solidified microstructures. The first type of grain refinement appeared in a low undercooling range (i.e., 50 K ≤ ΔT ≤ 90 K).

The remelting of primary dendrites during or after rapid solidification was due to liquid/solid Author: Kai Ma, Yuhong Zhao, Xiaolong Xu, Xiaolong Xu, Hua Hou. In this work, we develop one- and two-dimensional phase-field simulations to approximate dendritic growth of a binary Al–2 wt% Si alloy.

Simulations are performed for both isothermal as well as directional solidification. Anisotropic interface energies are included with fourfold symmetries, and the dilute alloy assumption is : J. Allen. Rapid solidification and microstructure evolution of deeply undercooled bulk concentrated Ni% and Co% alloys are strictly and systematically evaluated.

First, thermodynamics of the undercooled melt is discussed. Consideration is provided for not only the systematic microstructure evolution within a broad undercooling range, but also the dendrite Author: Xiaolong Xu, Hua Hou, Feng Liu. Competitions incorporated in rapid solidification of the bulk undercooled eutectic NiSi alloy Article (PDF Available) October with 77 Reads How we measure 'reads'.

Title: Metastable phase selection from undercooled Zr 77 Rh 23 liquid alloys. Abstract. From measurements of X-ray and neutron scattering of electrostatically levitated Zr77Rh23 liquids, a variety of metastable crystallization behavior was observed.

The metastable coupled-growth kinetics between the primary Fe 2 Ti and peritectic FeTi phases of undercooled Fe Ti alloy was systematically investigated by both electromagnetic levitation and drop tube techniques. Employing a high-speed camera, the rapid crystallization processes of levitated bulk alloy were recorded in the undercooling range of 34 Cited by: 4.

Abstract. The change of eutectic solidification mode in undercooled Ni wt pct B melt was studied by fluxing and cyclic superheating.

The eutectic structure is mainly controlled by the undercooling for eutectic solidification, ∆ T 2, instead of ∆ T 1, the undercooling for primary a small ∆ T 2 [ e.g., 56 K (56 °C)], the stable eutectic reaction (L → Ni 3 B + Ni.

both cases pure metal (Ni) and alloy (Fe-C) enables us to reduce the run time in simulation of dendritic evolution during solidification process. Phase-field Modeling Phase-field modeling for pure materials The phase-field model is based on the simultaneous solution of energy and phase equations for pure materials.

Mechanism of anomalous eutectic formation in the solidification of undercooled Ni–Sn eutectic alloy - Volume 23 Issue 8 - J.F. Li, X.L. Li, L. Liu, S.Y.

LuCited by: @article{osti_, title = {Dendritic solidification of undercooled Cu%Pb hypomonotectic alloy}, author = {Dong, C and Wei, B}, abstractNote = {The Cu-Pb monotectic system is the basis of an important category of wear-resistant materials especially bearing alloys.

Its industrially interesting composition ranges from 10 to 50%Pb. In order to produce aligned composites or. @article{osti_, title = {The microstructure and composition of equilibrium phases formed in hypoeutectic Te-In alloy during solidification}, author = {Wang, Baoguang and Hu, Jinwu and Wang, Chongyun and Yang, Wenhui and Tian, Wenhuai}, abstractNote = {As a key tellurium atoms evaporation source for ultraviolet detection photocathode, the hypoeutectic Te{sub 75}In{sub 25} alloy Author: Wang, Baoguang.

The solidification structure of undercooled melt of Ag-Cu alloy, entrained in its primary Cu-rich phase, has been investigated. The undercooling procedure consisted of equilibration of a Cu pct Ag alloy in the two-phase liquid-solid region, followed by repeated thermal cycling of the liquid.

Slow cooling of the sample in the present work established the Cited by: 2. microstructures in ternary Ag-Al-Cu alloy. The rst phase- eld simulations of this alloy were performed by Apel et al. (Chapter 29 in [11]). In the present analysis our aim is to investigate the material parameters and conditions which lead to the selection of the di erent patterns in a ternary eutectic alloy.

Phase- eld. Metastable phase was observed in as-solidified microstructure of undercooled Fe-Co alloy, provided that the initial undercooling (T) of the melt exceeds the critical value. On this basis, the forming mechanism and stability of metastable phase were investigated.

The forming mechanism of metastable phase in undercooled Fe-Co alloy was concluded as cooperative effect of Cited by: In this paper, based on the undercooled solidification of Fe-B alloy, the factor affected on recalescence process was investigated.

The relationship R = V Δ T/D was first found, where V is the growth velocity, Δ T the recalescence degree (approximate the undercooling), D the focus region diameter dependent on the distance of the : Junfeng Xu, Tian Yang, Zhuo Li, Xiao Wang, Ying Xiao, Zengyun Jian.

We review the studies on the thermophysical properties of undercooled metals and alloys by molecular simulations in recent years. The simulation methods of melting temperature, enthalpy, specific heat, surface tension, diffusion coefficient and viscosity are introduced and the simulated results are summarized.

By comparing the experimental results and various theoretical Cited by: Nucleation and Solidification Kinetics of Metastable Phases in Undercooled Melts / Olga Shuleshova Introduction Thermodynamic Aspects and Nucleation of Metastable Phases Metastable Phase Formation from Undercooled Melts in Various Alloy Systems The Metastable Supersaturated Solid Solution Phases The dendrite growth dynamics is investigated in undercooled melts of intermetallic compounds.

The Al 50 Ni 50 alloy is studied with respect to disorder trapping that leads to a disordered superlattice structure if the melt is undercooled beyond a critical by:   Solidification microstructure evolution of undercooled Cuwt.% Fe alloy melt has been described and analyzed in detail based on experimental and theoretical studies.

It was found that the droplet size of undercooled Cuwt.% Fe alloy melt gradually increased with the increase in the undercooling. Having this liquid phase of Field’s metal (T m = 62 °C) at room temperature, shows that the metal is undercooled. Homogeneous distribution of constituent elements in the alloy (Fig.

2C) indicates that solidification is averted probably due to lack of a nucleation sites or solidification catalysts on the surface under these high vacuum Cited by:. Purchase Rapidly Quenched Metals - 1st Edition.

Print Book & E-Book. ISBNBook Edition: 1.When the alloy melt is undercooled download pdf K, an obvious phase separation takes place and the uniform alloy melt separates into (Fe, Co)-rich and Cu-rich phases within K undercooling range. The primary γ-Fe phase takes place in a solid-state phase transformation and becomes α-Fe phase in the final by: [email protected]{osti_, title = {Nucleation process ebook of undercooled stainless steel by external nucleation seed}, author = {Guo, J Q and Tsukamoto, S and Kimura, T and Nakae, H}, abstractNote = {Competitive phase selection of undercooled melts between equilibrium ferrite and metastable austenite has been investigated as a function of undercooling.