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    Microstructure and the Fracture Mechanics of Fatigue Crack Propagation

    Published: 01 January 1989

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    Microstructure is the principal independent variable which can be used to control the fatigue crack growth rate (FCGR) once loading conditions and environment are established. Microstructure affects the FCGR through its influence on strain distribution (slip character), slip length, plastic zone size, and crack path. These factors, in turn, can influence both crack closure and the materials sensitivity to aggressive environments. This paper reviews the authors' perception of the current understanding of the effect of microstructure on FCGRs.


    age-hardened, alloy, coherent, continuous ferrite (CF), continuous martensite (CM), crack path, dispersoids, environment, fatigue crack propagation (FCP), fatigue crack growth rate (FCGR), linear elastic fracture mechanics (LEFM), microstructure, plastic zone size, single phase, slip, strain, stress-intensity factor, two phase

    Author Information:

    Starke, EA
    Dean, School of Engineering and Applied Science, Thornton Hall, University of Virginia, Charlottesville, VA

    Williams, JC
    General manager, Engineering Materials Technology Laboratories, General Electric Company, Cincinnati, OH

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP18825S