I have some aledgedly AA6061-T6 material but it fails the tensile strenth, elongation, and area reduction tests according to ASTM B211-92a. It was also noted that the copper content of that material is higher than allowable for 6061 alloy composition.
Q1: Can higher copper content in Al alloy reduce tensile strength and lead to higher deformation?
(Note that Si and Mg components were within allowable range).
Q2: Any other "typical" reasons for failing tensile strength in Al ?
2007-10-15 01:10:50 · 3 answers · asked by Marianna 6 in Science & Mathematics ➔ Engineering
A1: A copper content slightly out of range should not appreciably hurt its tensile strength.
A2: The "-T6" temper designation means that it should have been peak-aged for maximum strength. Your alloy was probably overaged, meaning that it was held for too long at whatever the aging (precipitation hardening) temperature was. If this is indeed the case, it would have to be solutionized, quenched and aged all over again. Alternatively, it could have been underaged, which would be much simpler to rectify. :-]
2007-10-15 02:52:18 · answer #1 · answered by Anonymous · 0⤊ 0⤋
this might be a little far out, but has it run into any mercury lately? That can cause aluminum to destructively corrode.
http://www.popsci.com/popsci/how20/09550e0796b84010vgnvcm1000004eecbccdrcrd.html
2007-10-15 08:28:50 · answer #2 · answered by quicksilv3rflash 3 · 0⤊ 0⤋
Were there any small surface cracks that might propagate under the tension?
2007-10-15 08:13:10 · answer #3 · answered by Rich Z 7 · 0⤊ 0⤋