Emerging Trends in Ultrasonic and Friction Stir Spot Welding of Polymers and Metal-Polymer Hybrids: A Review of Process Mechanics, Microstructure, and Joint Performance. - Kumari, Kanchan; Pradhan, Swastik; Samantra, Chitrasen; Priyadarshini, Manisha; Barua, Abhishek; Dhupal, Debabrata (Materials (1996-1944), 2026)