2024 T351 with stress relief
2024 T351 with stress relief
(OP)
Samples of 2024-T351 had a post heat treatment at 550 F for 3 hours (oven cool) for the purpose of stress relieving.
Did this time and temp have a detrimental effect on the properties?
Did this time and temp have a detrimental effect on the properties?





RE: 2024 T351 with stress relief
RE: 2024 T351 with stress relief
According to fig. 3.2.3.1.5(b) the R.T. elongation may get up above 20% from its T351 value of less than 10%. This implies the elongation tests were on material about 1/2" - 1" thick.
By inference fatigue properties will be worsened (perhaps by roughly the change in Ftu).
Fracture toughness *may* have gone up a bit. I'd be curious as to other people's opinion on this.