Mechanical characteristics of a superplastic aluminum-10.2%Mg-0.1%Zr alloy.
mechanicalcharac00hart.pdf (5.570Mb)Abstract
The elevated temperature mechanical characteristics of
an aluminum-magnesium-zirconium alloy were studied.
Thermomechanical processing consisted of solution treating
and hot working at 440°C and then warm rolling at 300°C to
94% reduction. Subsequent treatments included annealing at
200°C for one hour, and recrystallizing for one minute at
440°C. Tensile testing of warm rolled, annealed, and
recrystallized material was conducted at various strain
rates and temperatures. The data was analyzed to determine
strain-rate sensitivity coefficients and activation
energies, in turn to be correlated with microstructural data
concurrently obtained on this superplastic alloy. This
material exhibits particularly good ambient properties in
addition to the superplasticity.