This paper presents the results of an EMTEC funded project to develop low-cost titanium aluminide automotive valves. The alloy studied was Ti-47Al-2Nb-1.75Cr. In the course of the project over 800 valves were produced using several variations of the permanent mold casting process. Applying pressure during solidification improved the casting fill; however none of the permanent mold casting methods produced pore free as-cast valves. The as-cast microstructures of the valves produced by permanent mold casting were much finer than investment cast microstructures of similar section sizes. Of the permanent mold casting methods, the injection cast method exhibited the finest as-cast structure showing promise as a new method for producing fine grained TiAl components. The room temperature tensile properties of the permanent mold cast material were superior to those of investment cast material with a similar microstructure.


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    Title :

    Development of low-cost permanent mold automotive components from titanium aluminide alloy


    Additional title:

    Entwicklung von kostengünstigen Automobilbauelementen durch Dauerformgießen einer Titanaluminiumlegierung


    Contributors:
    Keller, M.M. (author) / Porter, W.J. (author) / Jones, P.E. (author) / Eylon, D. (author)


    Publication date :

    1997


    Size :

    8 Seiten, 5 Bilder, 2 Tabellen, 10 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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