A Closed‐Loop Recycling Technology for γ‐TiAl from Precision Cast Low Pressure Turbine Blades

Abstract

Due to the high generation of scrap in the process chain of γ‐TiAl semi‐finished goods and products, a suitable recycling process shows great potential to reduce production costs. Based on this circumstance, a closed loop recycling process for titanium‐aluminide scraps was developed. Resulting from this process, as a significant innovation for the titanium industry, it is possible to recycle titanium‐aluminide scraps and produce material with minimal oxygen content and almost no observable difference to primary alloys.

Tribological behaviour of double-glow plasma zirconium-yttrium alloying on γ-TiAl

“…However, the practical uses of γ-TiAl remains limited due to its inherent characteristic of long-range order limits the dislocation movement, which caused a poor wear resistance [2]. General Electric Company for example, equipped the last stages of their low-pressure turbine GEnX jet engine with cast TiAl blades [3,4]. However, γ-TiAl blades might be subjected to wear damage at the dovetail joint, resulting from the natural high frequency blade vibration and alternating centrifugal force.…”