| About this Abstract |
| Meeting |
10th International Symposium on Superalloy 718 and Derivatives (2023)
|
| Symposium
|
Superalloy 718 and Derivatives
|
| Presentation Title |
(LBN - P1) Investigation of the Deformation Mechanisms for Bi-Modally Distributed γ’ Precipitates in Allvac 718Plus Superalloy |
| Author(s) |
Geeta Kumari, Carl J. Boehlert, S Sankaran, M Sundararaman |
| On-Site Speaker (Planned) |
Geeta Kumari |
| Abstract Scope |
Alloy Allvac 718Plus is a relatively new superalloy developed to improve the properties of the widely-used superalloy Inconel 718 (IN 718). The strength of IN 718 significantly decreases at temperatures greater than 650°C due to the transformation of the metastable γ’’ (tetragonal, D022 structure) phase into the δ phase (orthorhombic, D0a structure). Allvac 718Plus, which was designed to address this issue, exhibits service temperature up to 704°C (55°C more than that for IN 718 and close to that for Waspaloy) and its formability is similar to IN 718 and better than that for Waspaloy. Allvac 718Plus contains γ’ precipitates as a major strengthening phase along with some grain boundary δ phase. The volume fraction and size of the γ’ and the δ phases are controlled by solution treatment followed by aging. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |