SYMPOSIA PAPER Published: 01 January 1989

Microstructure and the Fracture Mechanics of Fatigue Crack Propagation


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.

Author Information

Starke, EA
School of Engineering and Applied Science, Thornton Hall, University of Virginia, Charlottesville, VA
Williams, JC
Engineering Materials Technology Laboratories, General Electric Company, Cincinnati, OH
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Developed by Committee: E08
Pages: 184–205
DOI: 10.1520/STP18825S
ISBN-EB: 978-0-8031-5081-2
ISBN-13: 978-0-8031-1250-6