AL 7050-T7451
AL 7050-T7451
(OP)
Hi all,
I was interested in knowing AL7050-T7451 mechanical properties after being heated to 180°C and cooled again to room temperature.
At MMPDS, I found a curve (Fig. 3.7.4.2.1), showed below:

At 180°C (356°F), strength is reduced, so I should have care about hot operation, but there is no mention about what happens to mechanical properties after slow cool-down process and returning to room temperature. Is original strength regained? In which levels? As I am not a material engineer and have few aknowledgments in this area, can anyone help me please?
Best regards,
Eduardo Torrecillas
I was interested in knowing AL7050-T7451 mechanical properties after being heated to 180°C and cooled again to room temperature.
At MMPDS, I found a curve (Fig. 3.7.4.2.1), showed below:

At 180°C (356°F), strength is reduced, so I should have care about hot operation, but there is no mention about what happens to mechanical properties after slow cool-down process and returning to room temperature. Is original strength regained? In which levels? As I am not a material engineer and have few aknowledgments in this area, can anyone help me please?
Best regards,
Eduardo Torrecillas





RE: AL 7050-T7451
It is good to be careful using aluminum at elevated temperatures, keep in mind the reduction in strength is only linear up to a certain temperature (varies with alloy) then falls off precipitously.
Comprehension is not understanding. Understanding is not wisdom. And it is wisdom that gives us the ability to apply what we know, to our real world situations
RE: AL 7050-T7451
Because 180C is above the aging temperaure, I blieve you can expect the the strength to be reduced 10% after returning to room temperature if the Al is held at temp up to 1/2 hour. Longer time at temperature will derate the strength more but temperature is the more critical factor.
Look again at MMPDS. There might be a room temperature strength graph for overaged 7050. I know there a graph for 2024.
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RE: AL 7050-T7451
ntrs.nasa.gov/search.jsp?R=19990076131
I have a 1992 edition and for material code 3222 (this is 7050) page 22 shows test data for T7451 exposed to temps for given times.
Hope this helps.