Elevated Temperature Properties of Cast Aluminum Alloys A201-T7 and A357-T6
Abstract
The tensile, fatigue, fracture toughness, and fatigue crack growth properties of cast aluminum alloys A201-T7 and A357-T6 were evaluated at 250 F and 400 F. The tensile strength of A201-T7 decreased slightly at 250 F and dropped markedly at 400 F. The A201-T7 elongation increased as temperature increased. The tensile strength of A357-T6 decreased as test temperature increased. A357-T6 ductility increased then decreased as temperature increased. Valid fracture toughness values were difficult to obtain for both alloys. A201- T7 had an average K sub Ic of 22.3 ksi in at 250 F and an average K sub Q of 25. 0 ksi in at 400 F. For A357-T6 K sub Q values were 27.5 ksi in and 18.1 ksi in at 250 F and 400 F, respectively. Constant load amplitude fatigue strength decreased for both alloys. At low Ks, fatigue crack growth resistance decreased as test temperature increased.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1985
- Accession Number
- ADA163487
Entities
People
- J. D. Tirpak
Organizations
- Wright Laboratory