About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder-Based Manufacturing and Repair of Large Structural Components for Critical Applications
|
| Presentation Title |
Repair of Aluminum Alloy 7075 Using Laser Based Directed Energy Deposition |
| Author(s) |
Jayme S. Keist, Cory Jamieson, Lloyd Hackel, Alan Timmons, Nam Phan, Amarendra Rai |
| On-Site Speaker (Planned) |
Jayme S. Keist |
| Abstract Scope |
Aluminum alloy (AA) 7075 exhibits poor weldability with a propensity of forming cracks making this alloy difficult to repair using traditional welding technologies. In this work, a laser based directed energy deposition (DED) system with blown powder was used to demonstrate repair of AA 7075 coupons in the T651 condition. To reduce cracking susceptibility, a layer of a low melting point aluminum alloy, AlSi10Mg, was first deposited on the AA 7075. With the aid of a 2D laser scanner, repair was completed with a layer-by-layer deposition of a high strength Al-Mg-Sc alloy. During the repair, the heat input was controlled to reduce substrate heating allowing for repairing the coupon without the need for subsequent heat treating. Finally, the repair region underwent subsequent laser peening (LP) to induce compressive stresses that improved the fatigue life as compared to the non-repaired baseline coupons. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Additive Manufacturing, Powder Materials |