Aviation, space and rocket industries use only the titanium alloys developed by the Research Institute of Aviation Materials. The processes of manufacture of structures from titanium alloys and pressure treatment, also developed at the Institute, form the basis of technologies for advanced aircraft systems. Complex macro- and microalloying results in the high service properties of the parent material and wj in structures in a wide temperature range from -253 deg C to 600 deg C. Combining complex macroalloying with the microalloying of the parent material and the application of filler wire for welding results in a significant improvement in the development of alloys and welded structures from these alloys. The improvement of the mechanical properties is the result of the decrease of the size of the primary beta-grains, improvement of the condition of the grain boundaries, large changes in the intragranular structure, the dispersion uniform breakdown during ageing, changes in the nature of distribution of the impurities and alloying elements, the increase of the density of dislocations and a decrease of the size of the regions of coherent scattering. To produce structural titanium alloys with high specific strength at room (18 deg C to 20 deg C) and elevated temperatures, it is necessary to combine the metallurgical and technological factors of influencing the structure of titanium alloys in the design and technology of manufacture of components. The alloys for special applications of VT5-1 and VT5-1kt with the alpha-structure are recommended for service at a temperature of -253 deg C. The ultimate strength of these alloys is 750 MPa and the strength of the alpha-alloys of this type can be improved only slightly by alloying. Textural hardening of this alloy increases the strength in biaxial tensile loading of the alloy by 40% (up to 1150 MPa). The proposed theoretical fundamentals of complex alloying, thermal and therrnomechanical treatment, and also textural hardening of the titanium alloys have been used in the development of advanced structural titanium alloys and efficient methods of thermal and thermomechanical treatment, resulting in the effective application of titanium alloys in cosmonautics, aviation and rocket technology.


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    Titel :

    Development of structural titanium alloys for components and sections in aerospace technology


    Beteiligte:
    Khorev, A.I. (Autor:in)

    Erschienen in:

    Welding International ; 24 , 10 ; 790-798


    Erscheinungsdatum :

    2010


    Format / Umfang :

    9 Seiten, 8 Bilder, 2 Tabellen, 14 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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