SYMPOSIA PAPER Published: 01 January 1970
STP32043S

Effects of Notches and Saltwater Corrosion on the Flexural Fatigue Behavior of High-Strength Structural Alloys

Source

The effects of mechanical notches and saltwater corrosion on the flexural fatigue behavior of seven high-strength structural alloys were investigated over a broad life range of 1,000 to 100 million cycles. The seven alloys (three ferrous, three titanium, and one aluminum) had approximately the same ratio of yield strength to density.

Results showed that notches were most damaging in the high-cycle life range, and that only titanium alloys exhibit a fatigue limit when subjected to corrosion fatigue. When compared on the basis of fatigue strength in air, the high-strength steels are superior over the entire life range. If, however, comparisons are made on the basis of ratio of fatigue strength to density, all seven alloys are approximately equal. The comparison of fatigue strength and ratio of fatigue strength to density over the broad life range for corrosion fatigue shows the titanium alloys to be superior at intermediate and long lives.

Author Information

Schwab, RC
Naval Ship Research and Development Center, Annapolis, Md.
Czyryca, EJ
Naval Ship Research and Development Center, Annapolis, Md.
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Details
Developed by Committee: E08
Pages: 203–216
DOI: 10.1520/STP32043S
ISBN-EB: 978-0-8031-4584-9
ISBN-13: 978-0-8031-0032-9