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Mechanical Behavior of Three-Dimensional Braided Nickel-Based Superalloys Synthesized via Pack Cementation

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Abstract

Braided tubes of Ni-based superalloys are fabricated via three-dimensional (3-D) braiding of ductile Ni-20Cr (wt pct) wires followed by post-textile gas-phase alloying with Al and Ti to create, after homogenization and aging, γ/γ′ strengthened lightweight, porous structures. Tensile tests reveal an increase in strength by 100 MPa compared to as-braided Ni-20Cr (wt pct). An interrupted tensile test, combined with X-ray tomographic scans between each step, sheds light on the failure behavior of the braided superalloy tubes.

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The authors acknowledge financial support from the Defense Advanced Research Projects Agency under Award No. W91CRB-10-1-0004 (Dr. Judah Goldwasser, program manager). NL thanks the Sonderforschungsbereich 880, Deutsche Forschungsgemeinschaft, and its graduate research program, Modul Graduiertenkolleg (MGK), for the financial support. Special thanks to Professor Joachim Rösler, the Institute for Materials–TU Braunschweig, for helpful discussions and comments. This work made use of the OMM Facility, which receives support from the MRSEC Program (NSF DMR-1121262) of the Materials Research Center at Northwestern University, and the EPIC facility of the NUANCE Center at Northwestern University, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF NNCI-1542205); the MRSEC program (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN.

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Authors and Affiliations

  1. Institute for Materials, TU Braunschweig, Langer Kamp 8, 38106, Braunschweig, Germany

    Nicolas Lippitz

  2. Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL, 60208, USA

    Dinc Erdeniz & David C. Dunand

  3. TexTech Industries, Inc., 1 City Center, Portland, ME, 04101, USA

    Keith W. Sharp

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  1. Nicolas Lippitz
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  2. Dinc Erdeniz
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  3. Keith W. Sharp
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  4. David C. Dunand
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Correspondence to Nicolas Lippitz.

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Manuscript submitted October 27, 2017.

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Lippitz, N., Erdeniz, D., Sharp, K.W. et al. Mechanical Behavior of Three-Dimensional Braided Nickel-Based Superalloys Synthesized via Pack Cementation. Metall Mater Trans A 49, 817–821 (2018). https://doi.org/10.1007/s11661-018-4467-9

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  • DOI: https://doi.org/10.1007/s11661-018-4467-9

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