You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.


    Dynamic Fracture Toughness Measurements of High-Strength Steels Using Precracked Charpy Specimens

    Published: Jan 1974

      Format Pages Price  
    PDF () 26 $25   ADD TO CART
    Complete Source PDF (4.7M) 26 $68   ADD TO CART


    The dynamic fracture toughness, KId, was measured in a number of ferrous alloys using precracked Charpy specimens and an instrumented impact machine. The alloys investigated included quenched and tempered steels (H-11, D6AC, and 4340), 18Ni maraging steels (grades 200, 250, and 300) and a high-temperature, stainless maraging steel (Pyromet X-15). Standard Charpy specimens were precracked in fatigue and tested at either 72°F (22°C) or -65°F (-54°C). Values of KId, were determined as a function of yield strength and microstructure, and correlations were established between KId and both the energy to initiate fracture, Wm/A, and the total energy of fracture, W/A. The instrumented, precracked Charpy test is shown to be a convenient method of determining relative fracture toughness; under proper conditions this test procedure can be used to determine the dynamic planestrain fracture toughness.


    impact tests, dynamic tests, toughness, fracturing, ferrous alloys, strain rate, low temperature tests, evaluation tests

    Author Information:

    Koppenaal, TJ
    Supervisor, Philco-Ford Corporation, Newport Beach, Calif.

    Committee/Subcommittee: E28.07

    DOI: 10.1520/STP32187S

    CrossRef ASTM International is a member of CrossRef.