Abstract
Although theK IC value of a material is a very useful measure of fracture toughness, its valid experimental determination can be a complex and expensive procedure, not at present suited to routine alloy screening or quality control purposes. To explore the feasibility of estimatingK IC in titanium alloys using techniques that are more convenient to perform, impact and slow-bend tests were made on either V-notched or fatigue-precracked Charpy specimens, and the resulting energy values were compared with the corresponding approximateK IC values. Of the various tests studied, results from five titanium-based alloys, two steels, and two aluminum alloys showed that precracked specimens broken in slow-bend hold the most promise of giving energy values that can be related toK IC . The best correlation came from specimens having mostly flat fractures, but in the higher-toughness cases, where shear lips of an appreciable size were formed, just as reasonable a relationship between energy andK IC was observed when flat-fracture energies were used.
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Ronald, T.M.F., Hall, J.A. & Pierce, C.M. Usefulness of precracked charpy specimens for fracture toughness screening tests of titanium alloys. Metall Trans 3, 813–818 (1972). https://doi.org/10.1007/BF02647654
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DOI: https://doi.org/10.1007/BF02647654