About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
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Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
ON DEMAND: Effect of Crystal Orientation on Creep Deformation Behavior of a Single Crystal High Entropy Superalloy |
Author(s) |
Takuma Saito, Akira Ishida, Michinari Yuyama, Yuji Takata, Kyoko Kawagishi, An-Chou Yeh, Hideyuki Murakami |
On-Site Speaker (Planned) |
Takuma Saito |
Abstract Scope |
There is a continuous effort to elucidate the relationship between microstructure and high temperature mechanical properties of high-entropy superalloys (HESAs), which possess similar gamma and gamma prime two phase structure to Ni-based superalloys, while their compositions are quite different. However effect of crystal orientation on the creep deformation behavior of single crystal HESAs has not been reported yet. This study focuses on the effect of crystal orientation on creep deformation of single crystal HESAs.
Single crystal bars of HESA (Ni-8.9Fe-16.9Co-7.5Cr-0.9Mo-0.5W-10.3Al-5.8Ti-1.2Nb in at.%) having approximately 70 vol.% of gamma prime precipitates were fabricated. Crystal orientation of each bar was checked by the X-ray Laue analysis then two specimens with characteristic crystal orientations were selected. Tensile creep tests were performed at 760 °C and 520 MPa and their creep deformation and rupture behavior depending on the crystal orientation was discussed based on the microstructural observation by SEM, TEM and EBSD analyses. |
Proceedings Inclusion? |
Undecided |