J. Phys. Colloques
Volume 48, Numéro C3, Septembre 19874th International Aluminium Lithium Conference
|Page(s)||C3-171 - C3-177|
J. Phys. Colloques 48 (1987) C3-171-C3-177
STATIC RECRYSTALLIZATION AFTER HOT WORKING OF Al-Li ALLOYSM. GONÇALVES et C.M. SELLARS
Department of Metallurgy, School of Materials, University of Sheffield, Mappin street, GB-Sheffield S1 3JD, Great-Britain
Small slabs of DC cast and homogenised 8090 and 8091 have been hot rolled in an experimental mill at temperatures in the range 300-500°C and subsequently solution treated at 550°C for times up to 48 hrs. Increase in rolling temperature leads to slower recrystallization, but the effect diminishes at long solution treatment times when the rolling temperature is above 400°C. Recrystallized grains are nearly equiaxed after rolling at temperatures below 400°C but are elongated after rolling at higher temperatures. After high temperature rolling, 8091 recrystallizes more rapidly to give less elongated grains than 8090. Fine particles appear to play a critical role in determining the recrystallization behaviour.