Gamma based titanium aluminides have received considerable attention recently as candidate materials in gas turbine applications, particularly low pressure turbine blades (1–3). Their low density and high specific stiffness, result in potentially significant weight savings in structures such as gas turbine engines if substituted for current materials. Two �-TiAl microstructures are predominatel...

[*] T. Schmoelzer, Dr. S. Mayer, Prof. Dr. H. Clemens Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, 8700 Leoben, (Austria) E-mail: [email protected] Dr. K.-D. Liss Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2232, (Australia) Dr. P. Staron Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Gees...

Ab stract De spite its sig nif i cance for the un der stand ing of the Aurig na cian in terms of be hav ioural vari abil ity and adap tive strat e gies in north ern lat i tudes, the ar chae o log i cal ma te rial of Breitenbach has never been pub lished com pre hen sively for al most a cen tury since its dis cov ery in 1924. More over, de spite the fact that the ex ca va tion ex tends over ca. ...

A com mon el e ment in plan ning the ad min is tra tion of the land sur face—or base—is to col lect in for ma tion that sum ma rizes cur rent and po ten tial uses of an area un der con sid er ation for a change of use. This in for ma tion should en com pass all mea sures of value of the land, such as cul tural, eco nomic, en vi ron men tal or wild life. Brit ish Co lum bia has a well-es tab lis...

The impact resistance and machinability of TiAl alloys, which are used for jet engine turbine blades, critical ensuring reliability reducing manufacturing costs. This study investigated the effects microstructure on these properties using Ti–Al–Cr ternary alloys via Charpy tests at room temperature 700 °C performing cutting a face mill with cemented carbide tools. As result, it was confirmed th...

Current limitations to a wider use of intermetallic TiAl alloys in aircraft and automotive engines arise from an insufficient oxidation resistance at temperatures above approximately 800 °C. In this paper, the high temperature behavior three engineering ?-TiAl-based 900 °C air is reported. The performance TNM alloy (Ti-43.5Al–4Nb–1Mo-0.1B), 4822 (Ti–48Al–2Cr–2Nb), Nb-free IRIS (Ti–48Al–2W-0.08B...

Small additions of Si and C have been proven to efficiently improve the creep properties intermetallic ?-TiAl based alloys. In order exploit full potential these alloying elements, detailed studies their influence on phase transformations resulting microstructural evolution during processing heat treatments are a necessity. This work presents fundamental investigation effect in composition rang...