Effects of Manganese Contents in Solid Solution and Microstructures on Creep Behavior of 3003 Aluminum Alloy Extrusions

摘要

The creep behavior of AA3003 alloy extrusions with various manganese contents in solid solution and different microstructures was investigated. Yield stress decreased with heat treatment time at 400 deg C both fibrous and recrystallized structures. These microstructures did not change during annealing. Specimen with high manganese contents in solid solution showed higher creep strength than that with low manganese contents even if yield stress were same at 200 deg C. Further, in the same manganese contents in solid solution, the specimen with the fibrous structure showed higher creep strength than the recrystallized one due to subgrain structures.