SYMPOSIA PAPER Published: 01 January 1967

Fatigue Fracture Surface Appearance


The macroscopic and microscopic appearance of fatigue fracture surfaces is strongly affected by the prevailing stress intensity conditions at the moving crack tip. The nature of the fatigue striation found during plane strain propagation is examined and crystallographic considerations introduced to explain different topographical striation arrangements. Program loading studies reveal the importance of stress intensity factor range and maximum or mean values in the determination of striation spacing. Evidence of fatigue damage accumulation is presented. “Elongated dimples” found in the plane stress region of crack propagation are not related to stress intensity conditions or macroscopic growth rate.

Author Information

Hertzberg, R., W.
Lehigh University, Bethlehem, Pa.
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Developed by Committee: E08
Pages: 205–225
DOI: 10.1520/STP47232S
ISBN-EB: 978-0-8031-6910-4
ISBN-13: 978-0-8031-6633-2