About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys: Development and Manufacturing
|
| Presentation Title |
Thermal Model for Binder Jetting Application: Simplified Thermal Boundary Conditions |
| Author(s) |
Etienne Martin, Heidar Karimialavijeh |
| On-Site Speaker (Planned) |
Etienne Martin |
| Abstract Scope |
Fatigue performance plays a critical role in structural applications, particularly in aerospace, where components undergo sever cyclic loading. In LPBF parts, fatigue behavior is highly influenced by surface roughness, as irregular surface features act as stress concentrators reducing the fatigue life. This study investigates two methods for improving the surface condition and fatigue performance of LPBF A20X: laser contour scanning and shot peening. A wide range of contour parameters was investigated. The best fatigue life (200% longer) was achieved at a scan speed of 350 mm/s and 50 µm offset, where Rv reduced to 10 µm. The improvement is attributed to more circular melt pools at low scan speeds, leading to shallower valleys between stacked tracks. Shot peening was conducted at three intensity levels. The optimal intensity, 0.2 mmA, reduced Rv by 50% and improved fatigue life by 156%, primarily through surface feature flattening and induction of compressive residual stresses. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Additive Manufacturing, Mechanical Properties |