| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
|
| Presentation Title |
Size Effect on the Ultrasonic Fatigue Behavior of Laser-powder Bed Fusion 316L |
| Author(s) |
Megan Louise Trombley, Qianying Shi, John E Allison |
| On-Site Speaker (Planned) |
Megan Louise Trombley |
| Abstract Scope |
The idea of size effect on fatigue behavior in metals has long been understood as the decrease in fatigue strength with increase in part size. With lab testing often evaluating the material rather than the exact part, higher fatigue strengths are often reported than what is observed in application. The reason for this discrepancy is largely attributed to differences in stress distribution and statistical scatter in strength and microstructure. This statistical scatter in strength is particularly evident in metals with a higher percentage of defects, as seen in additive manufacturing. Evidence of the size effect is demonstrated by cylindrical dogbone specimens of gauge 1.5, 2.5, and 5.0 mm manufactured via laser-powder bed fusion on both a Concept Laser M2 and a 3D Systems ProX DMP 200. An evaluation of the microstructure, defect size, and defect distribution have been conducted to describe the mechanism of size effect. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Mechanical Properties |