| Alloy | Si | Fe | Cu | Zn | Mn | Mg | Cr | Zr | Ti |
|---|---|---|---|---|---|---|---|---|---|
| AA6351 | 1.01 | 0.191 | 0.103 | - | 0.482 | 0.373 | 0.0164 | - | 0.0303 |
| AA7050 | 0.02 | 0.07 | 2.00 | 5.58 | - | 1.88 | - | 0.15 | - |
| Alloy/ Heat treatment | Treatment condition | Ageing | |
|---|---|---|---|
| First step | Second step | ||
| AA6351-T6 | 10ºC/min to 580ºC 580ºC - 15 min |
180ºC - 6 h | - |
| AA7050-T7451 | 10ºC/min to 485ºC 485ºC - 4 h |
110ºC - 2 h | 175ºC - 10h |
| Alloy/Ageing heat treatment | Treatment condition | Interrupted ageing | |
|---|---|---|---|
| First step | Second step | ||
| AA6351/T6I4-65 | 560ºC - 2 h | 180ºC - 1 h | 65ºC - 24 h |
| AA7050/T6I4-65 | 485ºC - 3 h | 145ºC - 30 min | 65ºC - 24 h |
| Alloy/Condition | AA6351-T6 | AA6351-T6I4 | AA7050-T7451 | AA7050-T6I4 |
|---|---|---|---|---|
| Hardness (HV) | 83.7 ± 4.4 | 65.3 ± 1.9 | 170 ± 2.7 | 171.0 ± 1.8 |
| Alloy/conditions |
σYS (MPa) |
σUTS (MPa) |
ε (%) |
UT (N mm/mm3) |
|---|---|---|---|---|
| AA6351-T6 | 312 | 342 | 13 | 40 |
| AA6351-T6I4 | 112 | 213 | 46 | 69 |
| AA7050-T7451 | 470 | 531 | 11 | 52 |
| AA6351-T6I4 | 473 | 561 | 19.4 | 100 |
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