NGUYEN, Thanh Trung; TUAN, Truong Cong; VU, Toan Thang. A Case Study of Surface Roughness Improvement for C40 Carbon Steel and 201 Stainless Steel using Ultrasonic Assisted Vibration in Cutting Speed Direction. Engineering, Technology & Applied Science Research, Greece, v. 14, n. 4, p. 15068–15073, 2024. DOI: 10.48084/etasr.7552. Disponível em: https://mail.etasr.com/index.php/ETASR/article/view/7552. Acesso em: 29 may. 2026.