| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Influence of Testing Method on Fatigue Performance of PBF-LB 316L Stainless Steel with As-Built Surfaces |
| Author(s) |
Edwin B. Glaubitz, Orion Kafka, Nik Hrabe, Joy Gockel |
| On-Site Speaker (Planned) |
Edwin B. Glaubitz |
| Abstract Scope |
As-built surfaces of components produced using laser powder bed fusion (PBF-LB) are rougher compared to other manufacturing processes. Valleys on as-built surfaces often act as the crack initiation sites during fatigue. Two commonly used fatigue testing methods are axial and four-point rotating beam fatigue tests, which produce different stress distributions throughout the cross-section of the material in the gauge section. Fatigue specimens made with 316L stainless steel with as-built surfaces of varying roughness and porosity are tested using both techniques. In four-point bending fatigue, the maximum stress is on the surface of the specimen, whereas in axial fatigue the stress is uniform across the cross-section. Relationships between measured surface roughness, fatigue test method, and fatigue life are analyzed. Understanding the influence of surface roughness and testing method (i.e., stress profile) on fatigue life of as-built surfaces will improve transferability of functional correlations between surface roughness measurement and performance. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |