An Approach to Low Temperature High Strain Rate Superplasticity in Aluminum Alloy 2090

Successful study of processing microstructural development and superplasticity in Al-Mg alloys has been extended to the Lithium-containing 2090 alloy. Attainment of superior superplastic response in the 2090 alloy has proven more difficult. Successive reductions in the temperature at which rolling was conducted have resulted in moderate improving to superplastic response. Modification to the rolling schedule has resulted in a continuously increasing strain rate during rolling while recovery temperature and rolling speed are unaltered from previous work. Keywords: Superplasticity.