Effect of test temperature on tensile properties of 1050 aluminum plate has been investigated at temperatures ranging from 473K to 4K for four kinds of specimens which are as rolled, recovered, partially recrystallized or fully recrystallized. The results obtained are as follows;
1. Deformation is more unifrom at 4K than at temperatures above 77K resulting in a marked increase in the elongation to fracture at 4K.
2. Proof stress increases almost linealy with decrease in test temperature, though there exists clear difference in the temperature dependence between fully recrystallized specimens and the specimens including a certain amount of residual stress.
3. Below 200K all specimens show the parabolic increase in the ultimate tensile strength with decrease in the test temperature. The as rolled specimen only tends to neck at 4K and at strain rate of 3.3×10
-4s
-1. The temperature dependence of ultimate tensile strength corresponds to the difference in residual stress and microstructures.
View full abstract