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Meeting 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Symposium 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Presentation Title Influence of Ultrasonic Vibration on Thermal Behavior and Solidification Characteristics in WAAM 316L Stainless Steel
Author(s) Poojith C. Chigurupati, Stibitz Christin, Haijun Gong, Bishal Silwal, Hossein Taheri
On-Site Speaker (Planned) Poojith C. Chigurupati
Abstract Scope The growing demand for improved microstructural control, reduced anisotropy, and enhanced mechanical performance in Wire Arc Additive Manufacturing (WAAM) has increased interest in the application of ultrasonic vibration during metal deposition. The thermal behavior, solidification, and microstructural evolution of stainless steel 316L fabricated by WAAM technique under high-intensity ultrasonic vibration were experimentally studied. Single-bead samples were fabricated by the robotic pulsed Gas Metal Arc Welding (GMAW) based WAAM system at different wire feed speeds and travel speeds. The study aims to evaluate the influence of ultrasonic excitation on melt pool geometry and its impact on directional solidification. Process stability and thermal behavior were examined using in-situ process monitoring via acoustic sensors and comparing conventional WAAM and ultrasonic-assisted WAAM. Microstructure control on dendritic morphology, grain structure and solidification pattern ware studied to elucidate the cavitation and acoustic streaming effect in WAAM fabricated stainless steel components.
Proceedings Inclusion? Undecided

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