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  1. No Access

    Article

    Direct observation of eutectic solidification using surface relief contrast

    W. J. Boettinger, R. B. Pond in Metallurgical Transactions (1973)

  2. No Access

    Article

    The structure of directionally solidified two-phase Sn-Cd peritectic alloys

    The structure of Sn-Cd two-phase peritectic alloys directionally solidified at various values ofG/υ (temperature gradient in the liquid divided by growth rate) is reported. The minimum value of G/υ as a function ...

    W. J. Boettinger in Metallurgical transactions (1974)

  3. No Access

    Article

    Solutal convection induced macrosegregation and the dendrite to composite transition in off-eutectic alloys

    The effect of solute gradient induced convection during vertical solidification on the macrosegregation of Pb-rich Pb-Sn off-eutectic alloys is determined experimentally as a function of composition and growth...

    W. J. Boettinger, F. S. Biancaniello, S. R. Coriell in Metallurgical Transactions A (1981)

  4. No Access

    Article

    Conference on Rapidly Quenched Metals

    W. J. Boettinger in JOM (1981)

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    Article

    Use of Metastable Phase Diagrams in Rapid Solidification

    During rapid solidification, the nucleation and/or growth of a thermodynamically stable phase may be difficult. In this case the liquidus, solidus or other thermodynamic data for a metastable phase are importa...

    J. H. Perepezko, W. J. Boettinger in MRS Online Proceedings Library (1982)

  6. No Access

    Article

    The Effect of Rapid Solidification Velocity on the Microstructure of Ag-Cu Alloys

    Electron beam solidification passes have been performed on a series of Ag-Cu alloys between 1 wt pct Cu and the eutectic composition (28.1 wt pct Cu) at speeds between 1.5 and 400 cm per second. At low growth ...

    W. J. Boettinger, D. Shechtman, R. J. Schaefer… in Metallurgical Transactions A (1984)

  7. No Access

    Chapter

    Microstructure Formation in Rapidly Solidified Alloys

    In order to apply solidification theory to the interpretation of micro- structures produced by rapid solidification, several modifications are required. Different degrees of non-equilibrium occur during solidi...

    W. J. Boettinger, S. R. Coriell in Science and Technology of the Undercooled Melt (1986)

  8. No Access

    Article

    An analysis of the microstructure of rapidly solidified Al-8 wt pct Fe powder

    Rapidly solidified powders of Al-8 wt pct Fe exhibit four distinct microstructures with increasing particle diameter in the size range of 5 μm to 45 μm: microcellular α-Al; cellular α-Al; a-Al + Al6Fe eutectic; a...

    W. J. Boettinger, L. Bendersky, J. G. Early in Metallurgical Transactions A (1986)

  9. No Access

    Article

    Icosahedral and decagonal phase formation in Al-Mn alloys

    The solidification conditions leading to the formation of the icosahedral phase in Al-Mn alloys have been investigated, using samples prepared by melt spinning and electron beam surface melting. It is found th...

    R. J. Schaefer, L. A. Bendersky, D. Shechtman… in Metallurgical Transactions A (1986)

  10. No Access

    Article

    A study of the coarsening of liquid-solid mixtures using synchrotron radiation microradiography

    W. J. Boettinger, P. W. Voorhees, R. C. Dobbyn… in Metallurgical Transactions A (1987)

  11. No Access

    Article

    On the Formation of Dispersoids during Rapid Solidification of an AI-Fe-Ni Alloy

    Examination of the effect of rapid solidification velocity on the microstructure of Al-3.7 wt pct Ni-1.5 wt pct Fe has revealed a new mechanism for the formation of discrete second phase particles in rapidly s...

    W. J. Boettinger, L. A. Bendersky, R. J. Schaefer… in Metallurgical Transactions A (1988)

  12. No Access

    Chapter and Conference Paper

    Towards a Phase Field Model for Phase Transitions in Binary Alloys

    To date phase field models have only been used to model non-isothermal phase transitions in a pure material. Here we describe recent steps which aim to extend phase field models to deal with binary alloys; a s...

    A. A. Wheeler, W. J. Boettinger in On the Evolution of Phase Boundaries (1992)

  13. No Access

    Article

    Controlled Interface Roughness in GaAs/AlAs Superlattices

    We report the results of our study of controlled interface roughness in low-order GaAs/AlAs superlattices. Samples were prepared using either the interrupted growth or the migration-enhanced epitaxy (MEE) tech...

    William R. Miller Jr., W. J. Boettinger, W. F. Tseng… in MRS Online Proceedings Library (1992)

  14. No Access

    Article

    Modeling of micro- and macrosegregation and freckle formation in single-crystal nickel-base superalloy directional solidification

    The formation of macrosegregation and freckles by multicomponent thermosolutal convection during the directional solidification of single-crystal Ni-base superalloys is numerically simulated. The model links a...

    M. C. Schneider, J. P. Gu, C. Beckermann… in Metallurgical and Materials Transactions A (1997)

  15. No Access

    Article

    Experimental and thermodynamic assessment of Sn-Ag-Cu solder alloys

    Sn-rich alloys in the Sn-Ag-Cu system are being studied for their potential as Pb-free solders. Thus, the location of the ternary eutectic involving L, (Sn), Ag3Sn and Cu6Sn5 phases is of critical interest. Phase...

    K. -W. Moon, W. J. Boettinger, U. R. Kattner… in Journal of Electronic Materials (2000)

  16. No Access

    Article

    Development of a freckle predictor via rayleigh number method for single-crystal nickel-base superalloy castings

    A Rayleigh number based criterion is developed for predicting the formation of freckles in Ni-base superalloy castings. This criterion relies on finding the maximum local Rayleigh number in the mush, where the...

    C. Beckermann, J. P. Gu, W. J. Boettinger in Metallurgical and Materials Transactions A (2000)

  17. No Access

    Article

    Transient liquid-phase bonding in the Ni-Al-B system

    Transient liquid-phase (TLP) bonding experiments were performed using a Ni-10.3 at. pct Al alloy and a Ni-10 at. pct B filler material, and the results were compared to simulations performed using the finite-d...

    C. E. Campbell, W. J. Boettinger in Metallurgical and Materials Transactions A (2000)

  18. No Access

    Article

    Alpha case thickness modeling in investment castings

    The alpha case thickness at the surface of a Ti-6Al-4V (wt pct) step wedge investment casting has been measured and successfully predicted. The prediction uses temperature-time results obtained from a heat flo...

    W. J. Boettinger, M. E. Williams… in Metallurgical and Materials Transactions B (2000)

  19. No Access

    Article

    Moving the pulsed heating technique beyond monolithic specimens: Experiments with coated wires

    Pulsed heating experiments that measure high-temperature thermophysical properties using pyrometric measurement of the temperature–time history of metal specimens rapidly heated by passage of electric current ...

    D. Josell, D. Basak, J. L. McClure, U. R. Kattner… in Journal of Materials Research (2001)

  20. No Access

    Article

    Determination of the CoTi congruent melting point and thermodynamic reassessment of the Co-Ti system

    New experimental results and a thermodynamic re-evaluation of the Co-Ti system are presented. Using differential thermal analysis (DTA) and a visual observation-of-melting (VOM) technique, the ≈220 K inconsist...

    A. V. Davydov, U. R. Kattner, D. Josell… in Metallurgical and Materials Transactions A (2001)

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