|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||GAT-2017 (Gamma Alloys Technology - 2017)
||Manufacturing Issues in Rapid Thermal Processing of γ-TiAl Alloys
||Marc Thomas, Alain Couret, Jean-Philippe Monchoux
|On-Site Speaker (Planned)
A current challenge for γ-TiAl is to manufacture robust alloys with efficient processing strategies to achieve optimized properties for high temperature applications. Despite extensive efforts, cast γ-TiAl alloys in turbine engines are limited by structural inhomogeneities, coarse microstructure and non-uniform solidification texture which lower their strength and ductility. Alternately, Powder Metallurgy, may offer grain refinement, structural homogeneity and isotropic properties. Secondary processing by HIP was successfully used for both TiAl powder densification and near-net shaping. This paper will address encouraging results in near net shaping by HIP. However, HIPing is slow and is not always flexible enough to provide optimized microstructure. Therefore, complex shape manufacturing using more rapid thermal processing has been extensively investigated in the last decade. Three innovative PM techniques will be reviewed: Metal Injection Moulding, Spark Plasma Sintering and Additive Manufacturing. This talk will highlight the critical variables of the above processes and compare the obtained alloys.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)