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Examples are given where influence of residual stress leads to erroneous interpretation of fatigue crack growth rate measurements made in accordance with ASTM Method E 647-78T. The experimental data presented form a basis for modification of applicable ASTM documents to give recognition to problems caused by residual stress, and to suggest guidelines for minimization of their effect on fracture property measurement.
residual stress, fracture mechanics, fatigue, fatigue crack growth, test methods (metals), mechanical properties (metals)
Technical specialist, Engineering Properties and Design Division, Alcoa Laboratories, Alcoa Center, Pa.