An Innovative Way to Produce γ-TiAl Blades: Spark Plasma Sintering

cited By 11International audienceA study is conducted to show that the production of turbine blades in γ-TiAl alloys through spark plasma sintering (SPS) is a viable manufacturing route, by demonstrating that near-net shaping of γ-TiAl blades is successful, and by developing an alloy with balanced and outstanding mechanical properties at room and high temperatures in a single run and without subsequent thermal treatments. It is demonstrated that replacing nickel-based superalloys by such Intermetallic γ-TiAl alloys with high specific modulus and mechanical strength, combined with an exceptional resistance to oxidation, is an effective contribution to the development of lighter aircraft engines with high performance. Casting processes such as centrifugal cast have demonstrated that sound TiAl parts with a complex shape such as low-pressure turbine blades can be achieved