Effects of Microstructure on Fatigue Crack Growth of High-Strength Aluminum Alloys.
Final technical rept. May 74-May 76,
ALUMINUM CO OF AMERICA ALCOA CENTER PA ALCOA LABS
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Effects of microstructure and composition on resistance to fatigue crack growth were determined using constant amplitude loading conditions in low and high humidity air at test frequencies of 2 and 20 Hz. Strengthening precipitate had the largest effect at delta K above about 4 KSI sq. root of in., while solute composition had the largest effect at delta K below about 3 KSI sq. root of in.. Large intermetallic particles affected growth at high and intermediate levels of delta K. Author
- Properties of Metals and Alloys