Threshold stress of A3003 alloy

摘要

The threshold stress of a commercially available A3003 alloy was investigated. The A3003 alloy was hot- and cold-rolled into 1-mm-thick plates, and annealed in the fully recrystallized condition. This material was subjected to high-temperature tensile testing and creep testing at temperatures of 160, 200, and 240°C, and the threshold stress was evaluated at the respective temperatures. The threshold stress, which was standardized by the testing temperature, was about 10 percent higher than the Orowan stress, which was calculated from the dispersion density. Further creep-testing experiments at 200°C using the binary solid solution Al-0.6%Mn alloy exhibited threshold stress despite the absence of dispersed particles. These results indicated that the solid solution of Mn increased the threshold strength of the A3003 alloy.