| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Corner Effects on Fatigue for As-printed Surfaces in Alloy 718 |
| Author(s) |
Rachel Tullis, Joy Gockel, Nathan Klingbeil, Luke Sheridan |
| On-Site Speaker (Planned) |
Rachel Tullis |
| Abstract Scope |
Component geometry is an important factor in the life of parts subjected to repeated loadings. Prior studies have shown that cracks initiate at sharp corners in most rectangular fatigue specimens. This is likely due to the large stress intensity factors of flaws that are located on sharp corners, although the extent of this relationship has not yet been studied for additively manufactured metals with as-printed surfaces. Using four different cross-sectional geometries (squares, hexagons, octagons, circles), this work has investigated the relationships between sharp corners and fatigue life in as-printed additively manufactured nickel superalloy 718. Additionally, fracture surface analysis has been performed to determine the location of crack initiation for each test, allowing for further investigation of the fatigue crack mechanisms in each specimen. The results of this work highlight the effects of cross-sectional geometry in as-printed additively manufactured parts, providing guidelines for the design of components under fatigue loading conditions. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |