Time-Dependent Fracture pp 121-130 | Cite as
Effects of Microstructure, Cold Work and Anisotropy on Creep Crack Growth in Carbon Manganese Steel at 360°C
Abstract
Creep crack growth in carbon manganese steel at 360°C has been observed and is strongly dependent on degree of cold work, micro-structure and orientation. The effect of 15% cold work is to increase crack velocities dramatically when the crack plane is parallel to the pre-strain direction. In the transverse direction the effect is less severe, the difference being attributed to variations in creep strength and inclusion distribution. Crack growth susceptibility in non-pre-strained material has been found to be a function of austenitizing temperature and microstructure, higher austenitizing temperatures resulting in increased crack velocities. Ferrite/pearlite and bainitic microstructures are more susceptible to crack growth than tempered martensite.
Keywords
Creep Strength Compact Tension Specimen Minimum Creep Rate Creep Crack Growth Crack Aspect RatioPreview
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