A cooperative program between the National Aeronautics and Space Administration (NASA), the Austrian Space Agency (ASA), Pratt & Whitney, Engineering Evaluation and Design, and Plansee AG was undertaken to determine the feasibility of achieving significant weight reduction of hypersonic propulsion system structures through the utilization of TiAl. A trade study defined the weight reduction potential of TiAl technologies as 25-35% compared to the baseline Ni-base superalloy for a stiffener structure in an inlet, combustor, and nozzle section of a hypersonic scramjet engine. A scramjet engine inlet cowl flap was designed, along with a representative subelement, using design practices unique to TiAl. A subelement was fabricated and tested to assess fabricability and structural performance and validate the design system. The TiAl alloy selected was PLANSEE's third generation alloy Gamma Met PX,11Gamma Met PX is a trademark of PLANSEE AG, Austria. a high temperature, high-strength gamma-TiAl alloy with high Nb content. Characterization of Gamma Met PX sheet, including tensile, creep, and fatigue testing was performed. Additionally, design-specific coupons were fabricated and tested in order to improve subelement test predictions. Based on the sheet characterization and results of the coupon tests, the subelement failure location and failure load were accurately predicted.


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    Titel :

    Development and evaluation of TiAl sheet structures for hypersonic applications


    Beteiligte:
    Draper, S.L. (Autor:in) / Krause, D. (Autor:in) / Lerch, B. (Autor:in) / Locci, I.E. (Autor:in) / Doehnert, B. (Autor:in) / Nigam, R. (Autor:in) / Das, G. (Autor:in) / Sickles, P. (Autor:in) / Tabernig, B. (Autor:in) / Reger, N. (Autor:in)


    Erscheinungsdatum :

    2007


    Format / Umfang :

    13 Seiten, 8 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Development and Evaluation of TiAl Sheet Structures for Hypersonic Applications

    Draper, S. L. / Krause, D. / Lerch, B. et al. | NTRS | 2007


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    Camarda, C. J. / Murrow, H. N. | TIBKAT | 1990


    Technology Development for High Speed/Hypersonic Applications

    Hagseth, Paul / Benner, William / Gillen, Sean et al. | AIAA | 2005


    Thermomechanical fatigue behaviour of a gamma-TiAl sheet material

    Schallow, P. / Christ, H.J. | Tema Archiv | 2005