Published: Jan 1979
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The fracture toughness properties of three steels (A516-70, A533B Class 1, and HY-130) are determined in two steel-quality levels (conventional and calcium treated). In addition, a conventional quality A543B Class 1 steel is similarly examined at two locations (quarterline and centerline). Both investigations involved comparing steels with differing inclusion structures. The primary effort was to establish the upper-shelf toughness differences found using the Charpy V-notch impact and dynamic tear tests compared with those found using J-integral determinations of JIc and KIc. The JIc determinations appeared to be more sensitive to changes in inclusion structure than either the Charpy V-notch or dynamic tear tests. This was established by comparing the toughness between quality levels and by measuring the anisotropy of toughness within a steel. Comparisons are made with the Charpy V-notch impact-KIc upper-shelf correlation values. Comments concerning the suggested graphical method for JIc determination are also given.
crack propagation, fractures (materials), inclusions, steels, plastic properties
Research engineer, Lukens Steel Company, Coatesville, Pa.
Paper ID: STP35844S