I'm going to re-test my part with new material. There doesn't seem to be a conservative way to be sure that my materials were correct during the original testing.
Thanks guys for all of your help!
Not really. We have access to other 2024-T351 4" plate, but it is not from the same sheet as the part in question.
I have found a reference that has answered my question regarding suitability of hardness testing to determine strenghth of aluminum. FAA AC 43.13-1B, 'Acceptable Methods...
The anomally is quesionable temperature control in the heat treating equipment. There were not enough thermocouples to satisfy AMS 2772 and AMS 2750.
The plate is 4.5".
Now I'm a little confused.
Mil Hanbook 5 has a plot that shows the "effect of exposure at elevated temperatures on the room temperature tensile ultimate strength". The plot shows a reduction in strength for any heating 200-700F for times .5-10,000 hours and then allowed to cool to room temp...
I have a 2024-T351 machined part that, since it's manufacure, was found to be made with questionable processes (not enough thermocouples in the heat treating process). The part is a prototype and has been tested and I need to know if the testing was valid in light of the discrepant material...
