About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
| Presentation Title |
Corrosion Behavior of Functionally Graded Inconel 718 Produced by Additive Manufacturing |
| Author(s) |
Yaiza Gonzalez-Garcia, Lola Devignes, Aytac Yilmaz, Arjan de Groot, Evgenii Borisov, Vera Popovich |
| On-Site Speaker (Planned) |
Yaiza Gonzalez-Garcia |
| Abstract Scope |
The corrosion behavior of functionally-graded (FGM) Inconel 718 manufactured by Selective Laser melting (SLM) was studied. A set of different process parameters was used to print specimens featuring a columnar coarse-grained (~500µm) and a fine equiaxed-grained (~100µm) structure with interface region of ~10µm. The corrosion properties were evaluated by polarization, EIS, SKP and SECM localized measurements in a 3.5%-NaCl solution on different with respect to building direction surfaces. Results showed no significant differences in the overall corrosion performance of the different zones, with the presence of a passivity region and high-capacitive response in the EIS spectra. The as-processed graded SLM specimens showed a comparable behavior to a commercial wrought and heat-treated Inconel alloy. From SKP and SECM, local differences in the reactivity of the zones were elucidated and directly correlated to the microstructural differences. The graded interface showed a gradual transition between the regions, without a dramatical change in reactivity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Other |