Accession Number:

ADA037156

Title:

Effects of Microstructure on Fatigue Crack Growth of High-Strength Aluminum Alloys.

Descriptive Note:

Final technical rept. May 74-May 76,

Corporate Author:

ALUMINUM CO OF AMERICA ALCOA CENTER PA ALCOA LABS

Report Date:

1976-08-01

Pagination or Media Count:

276.0

Abstract:

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

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE