TY - CHAP A1 - Zhang, J. A1 - Kutzsche, Anja A1 - Rosenberg, K. A1 - Viehweger, Bernd A1 - Leyens, Christoph T1 - A novel canning technology for forging of gamma-TiAl alloys N2 - A novel canning technology to forge gamma-TiAl alloys was developed at the BTU Cottbus. A TiAl specimen is encapsulated with multilayer stainless steel foil and glass. The steel foil layers prevent the heat loss through radiation and the glass layer reduces the temperature decrease through conduction. First, the effect of steel foil on the cooling rate was investigated. Cooling curves were recorded for TiAl specimens without steel foil layer, with 1, 2, 3 and 4 layers of steel foil, as well as with 3 coated steel foil layers, respectively. While the unprotected specimen cooled from 1200 °C to 1100 °C within 12 s, the specimen with 3 coated steel foil layers needed 52 s for the same temperature decrease. The efficiency of the glass layer was examined with forging of steel specimens. The cooling rate during forging of the specimen with a glass layer is only half of that without a glass layer. Based on the results, Ti-45Al-0.5Mo-0.5Cu-0.2Si specimens, canned with steel foil and glass, were successfully forged at strain rates of 0.1 s-1 and 0.04 s-1 with warm dies which were heated to 500 °C. Visual and metallographic examinations revealed no cracks, pores or micropores. The microstructures are fine-equiaxed grains. KW - canned forging KW - canning KW - TiAl Y1 - 2006 ER - TY - CHAP A1 - Kutzsche, Anja A1 - Zhang, J. A1 - Appel, Fritz A1 - Leyens, Christoph A1 - Viehweger, Bernd T1 - Forging of Beta-Phase containing gamma-TiAl alloys KW - TiAl Y1 - 2006 ER - TY - JOUR A1 - Zhang, Ping A1 - Lindemann, Janny A1 - Leyens, Christoph T1 - Influence of texture and microstructure on mechanical properties of high-strength wrought magnesium alloy AZ80 Y1 - 2006 ER - TY - JOUR A1 - Leyens, Christoph A1 - Braun, Reinhold A1 - Fröhlich, Maik A1 - Hovsepian, Papken T1 - Recent Progress in the Coating Protection of Gamma Titanium-Aluminides Y1 - 2006 ER - TY - JOUR A1 - Fröhlich, Maik A1 - Leyens, Christoph A1 - Braun, Reinhold T1 - Oxidation resistant coatings in combination with thermal barrier coatings on gamma-TiAl alloys for high temperature applications Y1 - 2006 ER -