MUMBAI, India, Feb. 6 -- Intellectual Property India has published a patent application (202541126536 A) filed by National Institute Of Technology, Mangaluru, Karnataka, on Dec. 14, 2025, for 'ultrasonic-assisted underwater cooling system for cmt-based wire-arc additive manufacturing of metallic components.'
Inventor(s) include Shambhu Kumar Manjhi; A. S. S Balan; and Srikanth Bontha.
The application for the patent was published on Feb. 6, under issue no. 06/2026.
According to the abstract released by the Intellectual Property India: "The proposed disclosure presents an ultrasonic-assisted underwater cooling system integrated with Cold Metal Transfer (CMT) Wire Arc Additive Manufacturing (WAAM) to address heat-related and microstructural limitations in metallic additive manufacturing. The system immerses the build component fully in a coolant bath throughout deposition, supported by a recirculating cooling loop that maintains stable near-room-temperature conditions for rapid and uniform heat extraction. A synchronized piston lowers the substrate by each layer thickness, ensuring continuous submersion. Simultaneously, an ultrasonic probe positioned beneath the substrate introduces high-frequency vibrations into the melt pool to promote grain nucleation, refine microstructure, collapse trapped gases, and reduce porosity and residual stresses. Together, these mechanisms enable fine-grained, homogeneous, high-strength components with improved dimensional accuracy and reduced post-processing requirements. The invention is particularly suited for heat-sensitive metals such as magnesium and aluminum and supports advanced aerospace, automotive, and biomedical manufacturing applications."
Disclaimer: Curated by HT Syndication.
