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This study examined fracture behavior of two HY-100 under-matched welds under dynamic loading. A new test fixture that provided greater control of specimen deflection during impact testing of SE(B) specimens was developed, as was a procedure for applying the Normalization Method to the analysis of dynamic fracture toughness tests. Successful application of Normalization involved using multiple specimens with varying ductile crack growth to establish the correct form for the plasticity function. The accuracy of the measured JId was verified by comparing with multi-specimen JId values.
under-matched welds, dynamic fracture toughness, HY-100, normalization
Senior engineer, Anteon Corporation, Naval Surface Warfare Center, West Bethesda, MD