Study of circulated nanofluids ZnO based-particle to improve hardness in quenching AISI 4140. BIS Energy and Engineering, [S. l.], v. 1, p. V124042, 2024. DOI: 10.31603/biseeng.100. Disponível em: https://unimma.press/conference/index.php/biseeng/article/view/100. Acesso em: 2 may. 2025.