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Notch Size Effects In Hcf Behavior Of Ti–6al–4v, George Haritos, Theodore Nicholas, David Lanning
Notch Size Effects In Hcf Behavior Of Ti–6al–4v, George Haritos, Theodore Nicholas, David Lanning
Dr. George K. Haritos
The high cycle fatigue (HCF) behavior of Ti–6Al–4V is investigated for cylindrical specimens having three sizes of geometrically similar circumferential V-notches, each with an elastic stress concentration factor, Kt, of approximately 2.78. A step loading technique for obtaining a point on a constant life (106 cycles) Haigh diagram from a single test specimen was implemented. Tests were performed at stress ratios of R=0.1, 0.5, and 0.8 for specimens machined from two different product forms of Ti–6Al–4V, bar and plate forgings. Results indicate that while there is a definite notch size effect in the Ti–6Al–4V bar within …