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Microstructure and mechanical properties of titanium aluminide wide-gap, transient liquid-phase bonds prepared using a slurry-deposited composite interlayer

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Abstract

An investigation of the wide-gap, transient liquid-phase (TLP) bonding of Ti-48 at. pct Al-2 at. pct Cr-2 at. pct Nb (“48-2-2”) substrates using 48-2-2 + Cu composite interlayers produced by an automated slurry deposition process is presented in this article. The as-deposited interlayer is characterized in the article, as are the resulting bonds. The microstructures of the bonds, identified using light microscopy (LM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), are correlated with their room-temperature mechanical properties, determined using four-point bend testing. Comparisons are drawn between bonds produced by the automated slurry route and bonds with manually deposited powder interlayers, as well as interlayers produced with a presintering step.

This article considers the extent to which this automated deposition process is able to produce even and consistent interlayers, given the large difference in density between the copper and 48-2-2 constituents of the interlayer. The results presented in this article suggest that, given the selection of suitable process conditions, high-quality bonds can be produced.

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Author notes

  1. M. Di Ruscio (Undergraduate Student, Product Engineer)

    Present address: the Materials Research and Education Center, Auburn University, 36849, Auburn, AL

Authors and Affiliations

  1. the Materials Research and Education Center, Auburn University, 36849, Auburn, AL

    W. F. Gale (Professor), D. A. Butts (Graduate Research Assistant) & T. Zhou (Graduate Research Assistant)

  2. Allvac, 29729, Richburg, SC

    M. Di Ruscio (Undergraduate Student, Product Engineer)

Authors
  1. W. F. Gale
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  2. D. A. Butts
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  3. T. Zhou
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  4. M. Di Ruscio
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Gale, W.F., Butts, D.A., Zhou, T. et al. Microstructure and mechanical properties of titanium aluminide wide-gap, transient liquid-phase bonds prepared using a slurry-deposited composite interlayer. Metall Mater Trans A 33, 3205–3214 (2002). https://doi.org/10.1007/s11661-002-0306-z

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  • DOI: https://doi.org/10.1007/s11661-002-0306-z

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