Neck-and-Split Tensile Fracture of Anisotropic Plate Steel

Abstract

Rolling-direction tensile specimens of 0.31 C quenched and tempered alloy plate steel displayed cup-and-cone, split-layered, neck-and-split, and square-break fracture configurations over distinct temperature ranges as testing temperature was lowered from 300 to −320 F. Formation of the neck-and-split configuration was investigated in terms of stress state, temperature, void formation, and anisotropy. Electron fractography identified quasicleavage as the fracture mode of the initially occurring longitudinal split. The brittle fracture phenomenon resulting in the neck-and-split fracture of plate specimens occurs under a unique combination of conditions.

Dynamic strain ageing, deformation, and fracture behavior of modified 9Cr–1Mo steel

“…Hrubec et al [37] observed quasi-cleavage fracture and river patterns on the longitudinal split in martensitic steel. Clough and Soloman [38] have established temperature range of 150 to À 200 1C for this type of fracture in 0.31 wt% C quenched and tempered martensitic steel.…”