Fractographic Study on the Fatigue Failure Surfaces of Heat-Treated and Shot Peened EN- 8 Steel (080M40/AISI 1040): FRACTOGRAPHIC ANALYSIS ON FATIGUE SURFACE OF HEAT- TREATED AND SHOT PEENED EN-8. Indian Journal of Engineering and Materials Sciences (IJEMS), [S. l.], v. 30, n. 4, p. 597–602, 2023. DOI: 10.56042/ijems.v30i4.961. Disponível em: https://or.niscpr.res.in/index.php/IJEMS/article/view/961. Acesso em: 13 may. 2026.