Fracture and ductile-to-brittle transition characteristics of molybdenum by impact and static bend tests

Abstract

Five kinds of molybdenum having different grain structures and different grain boundary strength were studied using the impact and static bend calculations. The pure molybdenum with or without bon addition and the TZM alloy had a fine and equiaxed grain structure, and the doped-molybdenum with or without carbon addition had a coarse and elongated grain structure. The total absorbed energy, the total deflection, yield and maximum stresses by the impact bend test, and the bend angle, yield and maximum stresses by the static bend test were calculated and compared with each other. The fracture and ductile-to-brittle transition characteristics by both test were discussed from the viewpoints of the grain structure and the grain boundary strength.