MECHKAROVA, Tatyana Mitkova; UCHERDZHIEV, Apostol; VALCHEV, Nikolay; MINCHEVA, Desislava. Investigationof tribological characteristics of 40Xgradesteel after hardfacedMMA welding method. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, [S. l.], v. 8, n. 2, p. 1–9, 2024. DOI: 10.29114/ajtuv.vol8.iss2.312. Disponível em: https://aj.tu-varna.bg/index.php/ajtuv/article/view/312. Acesso em: 2 oct. 2025.