| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
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Advanced Characterization of High-temperature Alloys: Phase Evolution during Manufacturing and Service-induced Deformation
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| Presentation Title |
Microstructural Characterization of Cost-effective Inconel 738LC Superalloy after Tensile Deformation at Various Temperatures |
| Author(s) |
Hyo Ju Bae, Kwang Kyu Ko, Eun Hye Park, Joong Eun Jung, Jung Gi Kim, Hyokyung Sung, Jae Bok Seol |
| On-Site Speaker (Planned) |
Hyo Ju Bae |
| Abstract Scope |
Inconel 738LC has been used in gas turbines as blades at high temperatures because of its excellent high-temperature mechanical properties. However, high cost due to the high addition of Co (8.00-9.00 wt%) limits their wide application. Herein, with the aim of reducing the Co contents in Inconel 738LC alloy, the chemical composition of typical Inconel 738LC is modified while increasing the tensile strength by 12% at various temperatures (room temperature-932 ℃). The mechanical properties significantly depend on the morphology and composition of Ni3(Al,Ti,Nb)-type precipitates(γ′). Nevertheless, atomic scale chemical composition changes during tensile deformation in constituent phases such as primary/secondary γ′ and matrix have not been reported. Therefore, the characterization of the modified Inconel 738LC after tensile deformation at various temperatures was investigated with comparing typical Inconel 738LC. To analyze the microstructure, multi-scale analyses were conducted using SEM/EDS, HRTEM, and APT. Details of the property-microstructure relations will be explained. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, Mechanical Properties |