Evaluation of Vibration Amplitude Stepping and Welding Performance of 20 kHz and 40 kHz Ultrasonic Power of Metal Welding. Indian Journal of Production and Thermal Engineering (IJPTE), [S. l.], v. 1, n. 2, p. 11–15, 2023. DOI: 10.54105/ijpte.B2009.061221. Disponível em: https://www.journals.latticescipub.com/index.php/ijpte/article/view/193.. Acesso em: 28 jun. 2025.