Fracture Toughness of High Strength Steel Predicted from Charpy Energy or Reduction in Area

    Published: Jan 1984

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    Analysis is presented of the results of an extensive mechanical and fracture test program. Ninety-six hollow cylinder forgings of A723 steel with five different manufacturing processes were tested at two locations with different outer diameters. Yield strength, plane-strain fracture toughness, Charpy impact energy, and tensile reduction in area were measured and analyzed for statistical variation and difference of mean value. Linear regression was used to fit lines to the data and to determine correlation coefficients. Conclusions were drawn as to the suitability of Charpy energy and reduction in area as predictors of plane-strain fracture toughness.


    fracture toughness, alloy steel, statistical analysis, mechanical tests, forged cylinders

    Author Information:

    Underwood, JH
    U.S. Army Armament Research & Development Center, Watervliet, N.Y.

    Leger, GS
    U.S. Army Armament Research & Development Center, Watervliet, N.Y.

    Committee/Subcommittee: E08.07

    DOI: 10.1520/STP32570S

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