College of Engineering
Materials Engineering Department
BS in Materials Engineering
This project investigated the overaging performance of aluminum alloy 2219-T852 for use in high temperature applications. 2219 aluminum is an alloy containing 5.8 to 6.8 percent copper, and is classified as a high strength age hardenable alloy. The sponsor for this project, Weber Metals, hopes to use 2219 Al to replace titanium in certain applications above the thermal limits of typical high strength Al. To test its performance, they manufactured round tensile samples and delivered them in peak aged, T852 condition. These samples were then overaged at a range of times and temperatures. The times in this experiment were one hour, five hours, and ten hours. The temperatures used in this experiment were 400°F, 450°F, 500°F, 550°F, 600°F. The 2219-T852 aluminum did not significantly overage after 5 hours at 400°F, and only slightly aged after ten hours at 400°F. At 450°F, the sample weakened after 5 hours. All other times and temperatures experienced severe overaging. This indicates that 2219 Al can withstand 400°F to 450°F environments while maintaining its heightened tensile strength for short periods of time.