INTERGRANULAR BRITTLE FRACTURE IN LOW ALLOY STEEL

E. Kantidis  B. Marini  P. Soulat      

Anales de la Mecánica de la Fractura, nº 9 . 1992 . Pág. 150 -153
Ver (.pdf): Anales09-026

Resumen: In this study, the local criterion of cleavage fracture, derived by Beremin, was used in the case of pure intergranular brittle fracture of a A533 Cl1 type steel wich was embrittled with special heat treatments. Pure intergranular fracture is observed up to -160°C for smooth tension specimens and up to -9ooc for notched ension specimens. The application of the statistical local approach of F.M Beremin model leads to a Weibull modulus of 9 and a clear bilinearity in the Weibull plot. The value of Weibull modulus is particularly low in comparaison with those obtained in the case of cleavage fracture for unsegregated material. The observed bilinearity may be implied by two concurent distributions with independent statistical parameters. Each individual distribution is found to be a two parameters Weibull distribution. A new bimodal local fracture criterion was derived for intergranular brittle fracture. This model could predict the temperature dependence of fracture toughness.

LocalizaciónAiguablava, Gerona

CEA - CEREM/SRMA Centre d'études de Saclay. France
CEA - CEREM/SRMA Centre d'études de Saclay. France
CEA - CEREM/SRMA Centre d'études de Saclay. France