STP665

    Dynamic Straining Stress Corrosion Test for Predicting Boiling Water Reactor Materials Performance

    Published: Jan 1979


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    Abstract

    A dynamic straining test has been developed for rapid screening of materials relative to stress corrosion cracking (SCC) in an accelerated high-temperature aqueous environment. The technique consists of conducting slow tension tests in an environment of 289 °C high-purity water with 8 ppm dissolved oxygen. This extremely aggressive environment was used in this investigation to maximize the potential for intergranular SCC. Future correlations in environments of industrial concern are required before full industrial utilization of this technique can be realized. Because of the nature of the environment, the test is conducted in an autoclave assembly using a unique sliding seal arrangement. In turn, the autoclave is connected to a recirculating, water-chemistry controlled loop system. Several applications are discussed to illustrate the use of the test method. In addition, a summary of the various qualification data correlating the dynamic straining test results with longer term constant load test results are presented.

    Keywords:

    dynamic strain, stress corrosion cracking, intergranular stress corrosion cracking, sensitivity, Type 304 stainless steel, 17-4PH (H1100) stainless steel, Type 308L stainless steel, Nitronic 50, ICL 473, ICL 167, weldments, nitriding, constant load, constant extension rate


    Author Information:

    Clarke, WL
    Principal metallurgical engineer, manager, Plant Component Behavior Analysis, and manager, General Electric Company, San Jose, Calif.

    Cowan, RL
    Principal metallurgical engineer, manager, Plant Component Behavior Analysis, and manager, General Electric Company, San Jose, Calif.

    Danko, JC
    Principal metallurgical engineer, manager, Plant Component Behavior Analysis, and manager, General Electric Company, San Jose, Calif.


    Paper ID: STP38114S

    Committee/Subcommittee: G01.08

    DOI: 10.1520/STP38114S


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