Aluminum Alloy 7475-T7651 Static and Dynamic Fracture Properties
Final technical rept. May 1974-Oct 1975
DAYTON UNIV OH RESEARCH INST
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Alloy 7475-T7651 is a high-strength 7000-series aluminum alloy. The ultimate strength and yield strength of the material are similar to those of alloy 7475-T651. There was little difference in the tensile strength capability between the two specimen orientations that underwent test. Fracture toughness in the longitudinal direction is excellent. The test alloy is tougher than all other 7000-series alloys currently in service. The long-transverse and short- transverse fracture toughness are lower than the longitudinal oriented toughness test results. The constant amplitude cyclic crack growth rate is similar to crack growth data on the same alloy in the T7351 and T651 tempers. A salt water test solution accelerated the crack growth rate by a factor of approximately three. A 250 F 121 C, 1000 Hour, furnace thermal cycle had the following effects on the test material reduced the tensile strength, improved the fracture toughness, had no effect on the cyclic crack growth rate, reduced fatigue life slightly, and had no effect on the stress corrosion cracking resistance.
- Properties of Metals and Alloys