|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||General Poster Session
||O-10: Control of Prior Particle Boundary Formation in Hot Iso-statically Pressed Nickel-based Superalloys
||Benjamin Georgin, Brian Welk, Hamish L Fraser
|On-Site Speaker (Planned)
Hot isostatic pressing (HIP) is an attractive cost-effective manufacturing process for aerospace superalloys because it allows near-net shape (NNS) production of complex engine components, reducing scrap and minimizing machining requirements. In addition, HIP results in a highly homogenous microstructure of uniform grain size without macro-segregation of alloying elements with properties which rival forgings. HIPed nickel-based superalloys tend to precipitate brittle oxides, carbides, and oxy-carbides at prior particle boundaries (PPB) because of significant alloying of oxide formers titanium and aluminum. PPB’s limit the fatigue performance of these alloys by providing an easy path for crack growth. Research is being conducted to eliminate or reduce the formation of these undesirable precipitates by altering HIP parameters and performing heat treatments both prior and subsequent to the HIP process. Control of PPB formation will drastically improve the lifetime and performance of nickel-based superalloy engine components.
||Planned: Supplemental Proceedings volume