| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Large-scale Metallic Components
|
| Presentation Title |
Comparing the Fatigue Behavior of Laser Powder Bed Fused Ti-6Al-4V: Single-laser vs. Dual-laser |
| Author(s) |
Seungjong Lee, Jiwon Jung, Shuai Shao, Donald Godfrey, Nima Shamsaei |
| On-Site Speaker (Planned) |
Seungjong Lee |
| Abstract Scope |
Laser powder bed fusion (L-PBF) systems with large build volumes typically subdivide the build area into subregions, with each of them being covered by a different laser. To ensure redundancy, these regions also have overlaps where parts are simultaneously scanned by at least two lasers. The single-laser and dual-laser fabricated parts may experience different thermal histories, resulting in different micro-/defect- structures and thus different mechanical properties. In this study, the fatigue behavior of single-laser and dual-laser Ti-6Al-4V specimens fabricated in a quad-laser L-PBF system was investigated. The specimens were built in two different orientations, vertically and horizontally, hot isostatically pressed, and subjected to uniaxial, fully-reversed fatigue tests in force-controlled mode. The results indicate that the microstructure, porosity, and fatigue behavior of single-laser and dual-laser are not significantly different. This may be ascribed to the defects being minimized and microstructure being homogenized by the heat treatments including hot isostatically pressing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Titanium |