| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
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| Symposium
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Defect and Phase Transformation Pathway Engineering for Desired Microstructures
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| Presentation Title |
Development of Superalloys Driven by Atomic-scale Interactions of Solutes with Crystal Defects |
| Author(s) |
Paraskevas Kontis, Stoichko Antonov, Philipp Kürnsteiner, Shyam Katnagallu, Jaber Mianroodi, Lola Lilensten |
| On-Site Speaker (Planned) |
Paraskevas Kontis |
| Abstract Scope |
Solutes constantly interact with moving crystal defects generated by the plastic deformation of an alloy. These interactions are not well understood, yet they control the structural integrity of safety-critical components in e.g. aero-engines. Understanding how solutes interact with defects during service and thermomechanical processing can pave the way towards unlocking new alloy design strategies. Through systematic high resolution characterization at the near-atomic scale by electron microscopy and atom probe tomography, we provide new fundamental insights into the physical interactions of solutes with crystal defects in deformed single crystal and polycrystalline superalloys. We will present how the partitioning of solutes at defects depend on the alloy composition, type of defect and deformation conditions. Besides, we will show how these interactions affect the desired microstructure during thermomechanical processing of polycrystalline superalloys. Finally, atomistic phase field simulations reveal insights into the role of defect velocity on the partitioning of solutes partitioning at defects. |
| Proceedings Inclusion? |
Planned: |