|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Continuous Phase Transformations
||Microstructural engineering of Ni-based superalloys processed by conventional and additive manufacturing
||Felix Theska, Nima Haghdadi, Sophie Primig
|On-Site Speaker (Planned)
The demand for Ni-based superalloys withstanding high mechanical workloads under aggressive high-temperature environments is growing continuously. Market forecasts predict an increase of ~30% in commercial aircraft and gas turbines. The ongoing technological success of superalloys is due to their multi-scale hierarchical microstructural design achieving contributions from different strengthening mechanisms.
A typical microstructure of an advanced superalloy consists of various interfaces, micron-scale precipitates, complex nano-scale precipitates, solute clusters, and solute segregation at interfaces. Targeted engineering of these multi-scale hierarchical microstructures unlocks superior mechanical properties, and is driven by advanced microscopy. Current challenges are around hot-formability and weldability which can be overcome by advancements in conventional thermo-mechanical processing or additive manufacturing.
This talk will summarize our recent progress in microstructural engineering and microscopy of superalloys. Advancements in processing of Alloy 718 and René 41 unlock enhanced strength and eliminate cracking. Innovative electron beam additive manufacturing of Alloy 738 promotes in-situ γ' precipitation.
||High-Temperature Materials, Characterization, Phase Transformations