| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
|
| Presentation Title |
Effect of Stress State and Pores on Multiaxial Fracture of Low- and High-ductility Additively Manufactured Metals |
| Author(s) |
Allison M. Beese |
| On-Site Speaker (Planned) |
Allison M. Beese |
| Abstract Scope |
The effect of internal pores and stress state on the fracture behavior of relatively high ductility 316L stainless steel and relatively low ductility Ti-6Al-4V manufactured via laser powder bed fusion (L-PBF) additive manufacturing (AM) was investigated. To do so, penny-shaped pores, with varying diameters, were intentionally fabricated inside cylinders during the layer-by-layer AM process. Uniaxial tension and notched tension specimens were machined from these cylinders, and samples were tested under tensile loading to simultaneously probe the effect of pore size and stress triaxiality (proportional to negative pressure) on the measured ductility of each of the metal alloys. Companion finite element analysis simulations of each test were performed to identify the evolution of stress state and strain accumulation up to fracture. This presentation will describe the fracture models used to capture these data as well as the impact of defects on fracture on these two disparate alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Modeling and Simulation |