Abstract
Microstructure and passive behavior of laser directed energy deposited Inconel 718 after homogenization and aging heat treatment were investigated. The deposit microstructure mainly consists of γ phase and (γ + γ″) phases after homogenization and homogenization + aging treatment, respectively. Both heat-treated samples present a similar trend on passive behavior within the potential ranging. However, compared to homogenization treatment, the passive film of the deposit exhibits a lower electrochemical stability after homogenization + aging treatment, which is caused by the accelerated ions transportation through the interface between γ″ phase and passive film.
| Original language | English |
|---|---|
| Article number | 110439 |
| Journal | Corrosion Science |
| Volume | 205 |
| DOIs | |
| State | Published - 15 Aug 2022 |
Keywords
- Additive manufacturing
- Inconel 718
- Ions transportation
- Laser directed energy deposition
- Passive film