Titanium aluminide shows good potential for lightweight applications at high temperatures, provided various problems are overcome. The primary problem, low-temperature brittleness, can be resolved through a combination of laser cladding and directional solidification. This paper explains how Ti48Al2Cr alloy is applied and how process parameters must be chosen so that directional solidification occurs. This involves the use of FEM simulations, carried out in parallel with experimental work, to determine temperature gradients and cooling rates at the solidification front and in the melt pool and their effect on solidification structures. Paper text in German.
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Issue Section:Hardcoating by Welding and Laser Processing