The aim of this paper is to analyze the microstructural development in samples of Ti-48Al-2Cr-2Nb (at.%) alloys obtained by powder metallurgy (P/M). This alloy has potential applications when high operating temperatures are required, e. g. turbines, aerospace applications, automotive engines valves and turbocharger rotors. The elementary powders were mixed for 1 hour, cold uniaxially pressed at 60 MPa and sintered at 1100°C, for 1 hour, under vacuum. Then, the specimens were milled and submitted to a second stage that included cold isostatic pressing (400 MPa) with subsequent hot uniaxial pressing (20 MPa), between 900 up to 1200°C, for 2 hours, in argon atmosphere. The alloys were characterized by XRD (X-ray diffraction), SEM (Scanning Electron Microscopy), EDS (Energy Dispersive Spectroscopy) and Vickers microhardness measurements. The results indicated the viability of the route and the tendency of a lamellar microstructure in high sintering temperatures.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Microstructural investigation of Ti-48Al-2Cr-2Nb (at.%) obtained by powder metallurgy using hot uniaxial pressing


    Weitere Titelangaben:

    Sae Technical Papers



    Kongress:

    2008 SAE Brasil Congress and Exhibit ; 2008



    Erscheinungsdatum :

    2008-10-07




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Densification of titanium alloys obtained by powder metallurgy

    Diniz, Edevaldo Faria / de Oliveira, Jose Luis / Lemos, Thales Gorla et al. | SAE Technical Papers | 2010



    Powder metallurgy

    Engineering Index Backfile | 1942


    Powder metallurgy

    Engineering Index Backfile | 1945


    Powder metallurgy

    Lenel, F.V. | Engineering Index Backfile | 1943