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Meeting Materials Science & Technology 2019
Symposium Ultra High Performance Metallic Systems for Aerospace, Defense, and Automotive Applications
Presentation Title Structures Formed under High Strain Deformation of Ni-based Superalloys
Author(s) Agnieszka Wusatowska-Sarnek, Adam Kruk
On-Site Speaker (Planned) Agnieszka Wusatowska-Sarnek
Abstract Scope Wrought and powder metallurgy processed Ni-based superalloys, such as Inconel 718 and IN100, are high strength superalloys widely used for applications in aeronautics, aerospace and power generation for components such as casings, compressor and turbine disks, shafts, and blades. These components require superior low cycle fatigue (LCF) properties, however LCF capability can be limited if the surface and subsurface damage and/or tensile residual stress is introduced during manufacturing processes or in service. The evolution of microstructure in Ni-based superalloys subjected to severe plastic deformation was investigated. Samples were exposed to various milling conditions as well as high speed sliding. The microstructural refinement in the specimen surface and subsurface was dependent on processing conditions. The deformation structure ranged from shear bands to micro- and nano-grains to partial amorphization of the outermost layer. Interestingly, these microstructures are common under the high strain rate deformation and are formed by dynamic recrystallization.
Proceedings Inclusion? Definite: At-meeting proceedings


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