Abstract
ATI 718Plus components are manufactured by forging a wrought billet in stages to obtain the desired geometry and microstructure. Parts are then heat treated to optimized proportions of γ’ and η phases. η phase is a plate-like phase that precipitates on the grain boundaries of ATI 718Plus, similar to δ phase in Inconel 718. However, the complete kinetic behaviour of η phase precipitation during forging and heat treatment is still not fully understood. This paper investigates the effects of strain hardening on η phase precipitation kinetics in ATI 718Plus. This is achieved through the use of isothermal hot compression tests and heat treatment. Strain hardening was found to affect the η precipitation kinetics considerably. The results reported are a contribution to a fuller understanding of this important process.
| Original language | English |
|---|---|
| Pages (from-to) | 167-172 |
| Number of pages | 6 |
| Journal | Materials Science Forum |
| Volume | 907 |
| DOIs | |
| Publication status | Published - 25 Sept 2017 |
| Event | 10th International Conference on Materials Science and Engineering, BraMat 2017 - Brasov Duration: 8 Mar 2017 → 11 Mar 2017 |
Keywords
- ATI 718Plus
- eta phase
- precipitation kinetics
- strain hardening
- η phase