About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Pulsed Arc Additive Manufacturing of a Duplex Stainless Steel and HSLA Functionally Graded Material |
Author(s) |
Stevens G. Hill, Bishal Silwal |
On-Site Speaker (Planned) |
Bishal Silwal |
Abstract Scope |
A functionally graded structure is fabricated using P-WAAM with ER2209 and LA100 (HSLA). Parameter optimization studies are performed to determine optimal printing parameters of each material and the proper layer ordering for the material combination. After FGM fabrication, mixing of the constituents was observed in many locations at the heterogeneous material interface.Samples taken from ER2209 exhibited a high fraction of austenite, with the ferrite fraction increasing away from the weld interface. Microhardness testing revealed ER2209 had a higher hardness than the LA100, with the highest average hardness observed at the immediate interface. Digital image correlation of the tensile tests revealed small stress concentrations at the FGM interface that were not deleterious to the strength of the material (σy=518.350±15.081, UTS=681.629±8.095, ϵ=18.4%). Fractographic observation revealed failure in the LA100 due to microvoid coalescence with most voids originating from inclusions. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |