In-situ proton radiography of solidification in Sn-Bi, Al-Cu, Al-In and Bi-Ga melts

ORAL

Abstract

In-situ observation of the solidification phenomena in metals can lead to better understanding and control of microstructure evolution. Proton radiography offers the ability to image thick samples of high z material. Recently, in-situ proton radiography was used to directly observe dynamic processes during melting and solidification in bulk binary alloy systems. The spatial resolution was $\sim $65 microns for a 44 x 44 mm2 field of view. The time scale of each experiment was 2 to 6 hours. The data collected allowed for the determination of solidification front velocities, captured the changes in solid/liquid densities and showed evidence of convective fluid flow in the melt. Microstructural features larger than approximately 100 microns in the solid phase were observed.

*Work at Los Alamos suported by NNSA and the Department of Energy

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Authors

  • Jason Cooley

    • Los Alamos National Laboratory

  • Amy Clarke

    • Los Alamos National Laboratory

  • Christopher Morris

    • Los Alamos National Laboratory

  • Brian Hollander

    • Los Alamos National Laboratory

  • Tim Tucker

    • Los Alamos National Laboratory

  • Thomas Ott

    • Florida State University

  • Robert Field

    • Los Alamos National Laboratory

  • David Korzekwa

    • Los Alamos National Laboratory

  • Duncan Hammon

    • Los Alamos National Laboratory

  • Kester Clarke

    • Los Alamos National Laboratory

  • Patrick Kennedy

    • Los Alamos National Laboratory

  • Frank Merill

    • Los Alamos National Laboratory

  • Fessaha Mariam

    • Los Alamos National Laboratory

  • Martha Barker

    • New Mexico Institute of Mining and Technology

  • James Foley

    • Los Alamos National Laboratory

  • Robert Aikin

    • Los Alamos National Laboratory

  • Joshua Hill

    • Los Alamos National Laboratory

  • Dan Thoma

    • Los Alamos National Laboratory

  • Finian O'neill

    • Boston College

  • Megan Emigh

    • New Mexico Institute of Mining and Technology

  • Bo Folks

    • Los Alamos National Laboratory