About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Environmental Degradation of Additively Manufactured Alloys
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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 |