| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing: Materials, Alloy Development, Microstructure and Properties
|
| Presentation Title |
Effect of Heat Treatment on Additively Manufactured Ni-based Superalloys |
| Author(s) |
Colleen Hilla, Michael Mills, Wei Zhang, Alfred Okello, Alber Sadek, Hyeyun Song |
| On-Site Speaker (Planned) |
Colleen Hilla |
| Abstract Scope |
Additive manufacturing is widely used in the aerospace industry due to the ease of creating complex geometries with internal channels. γ' strengthened Ni-based superalloys are often used in aerospace for their high temperature strength and creep behaviors. Rene65 is one such alloy that is used primarily in turbine disks. The precipitation behavior, grain size and structure, play a large role in the strength, creep behavior, and printability. This study aims to analyze the effect of solution heat treatment on grain size, grain structure, and precipitate structure. Both solution temperature and hold time were altered to analyze the effect of both. Recrystallization is seen in temperatures above 1066°C and times above 15 min. There is a larger driving force for recrystallization due to the residual stress built up during printing. At sufficient times and temperatures, the dissolution of precipitates that are pinning the grain boundaries allows for this recrystallization to occur. |