J. Phys. Colloques
Volume 48, Numéro C3, Septembre 19874th International Aluminium Lithium Conference
|Page(s)||C3-277 - C3-283|
J. Phys. Colloques 48 (1987) C3-277-C3-283
SUPERPLASTICITY OF 2090 SPF SHEET AT HOT ROLLED GAUGEC.W. CHO, B.A. CHENEY, D.J. LEGE et J.I. PETIT
Aluminum Company of America, Alcoa Laboratories, Alcoa Center, PA 15069, U.S.A.
The superplastic properties of relatively thick, 0.44 cm, gauge superplastic 2090 sheet produced by a special thermomechanical hot rolling process are examined. Superplastic tensile elongations are highest in the longitudinal orientation and lowest in the long transverse orientation with all values in excess of 600%. The post-superplastically formed strength levels are lower than those of nondeformed 2090. The loss of strength is attributed to dynamic recrystallization and cavitation during forming.