About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
|
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
ON DEMAND: Mechanical Properties of High Entropy Single Crystal Superalloys at Elevated Temperatures |
Author(s) |
Hideyuki Murakami, Takuma Saito, An-chou Yeh |
On-Site Speaker (Planned) |
Hideyuki Murakami |
Abstract Scope |
High entropy alloys (HEAs) have opned a vast composition field for materials design and some alloys have demonstrated excellent mechanical properties with reasonable ductility. In addition, lower mobility of alloying elements in the alloys could maintain microstructural stabilities and mechanical properties at elevated temperatures. High entropy superalloys (HESAs) have been proposed to design alloy composition to lie in the high entropy field and to have coherent gamma and gamma prime two-phase microstructure, thereby HESAs are expected to possess excellent high temperature properties.
In the presentation, heat treatment, microstructure and high temperature mechanical property relationships of a HESA (Ni-8.9Fe-16.9Co-7.5Cr-0.9Mo-0.5W-10.3Al-5.8Ti-1.2Nb in at. %) are discussed. It is confirmed that change in heat treatments drastically altered the configurational features of gamma prime precipitates, which accordingly variated tensile and creep properties. It should be noted that excellent ductility of HESA is confirmed with the full standard sized single crystal tensile / creep specimens. |
Proceedings Inclusion? |
Undecided |