STP563

    Instrumented Impact Testing of Titanium Alloys

    Published: Jan 1974


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    Abstract

    The dynamic fracture toughness was determined for two titanium alloys (Ti-6A1-4V and Ti-6A1-6V-2Sn) from different suppliers and in various heat-treated conditions. The strain-rate effect associated with the dynamic test is shown to increase the fracture toughness for all the alloys with the exception of mill-annealed and duplex-annealed Ti-6A1-6V-2Sn, where the fracture toughness was found to be independent of strain rate. Dial energy per unit specimen area (W/A)d for precracked Charpy specimens can be used to calculate KId as long as a relatively flat fracture appearance (small shear area) is obtained. Otherwise, when a large amount of shear is present, the energy to maximum load (W/A)m or Pmax from the load-time trace must be used to calculate KId.

    Keywords:

    impact tests, strain rate, static fracture toughness, dynamic fracture toughness, inertia loads, instruments, dynamic calibration, dial energy, energy to maximum load


    Author Information:

    Ewing, A
    California State University, Long Beach, Calif.

    Raymond, L
    Head, Metallurgy Research, Materials Sciences Laboratory, The Aerospace Corporation, El Segundo, Calif.


    Paper ID: STP32192S

    Committee/Subcommittee: E28.07

    DOI: 10.1520/STP32192S


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