| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing: Microstructure and Material Properties of Titanium-based Materials
|
| Presentation Title |
Fracture of additively manufactured Ti-6Al-4V under multiaxial loading: experiments and modeling |
| Author(s) |
Alexander E. Wilson-Heid, Allison M. Beese |
| On-Site Speaker (Planned) |
Alexander E. Wilson-Heid |
| Abstract Scope |
The orientation dependent plasticity and fracture behavior of the titanium alloy Ti-6Al-4V manufactured via laser powder bed fusion (L-PBF) additive manufacturing (AM) was experimentally determined. Tests under uniaxial tension, pure shear, plane strain tension, and combined tension/shear loading showed that samples loaded in the vertical build direction had a higher ductility than corresponding samples loaded perpendicular to the vertical build direction. The experimental results were then used in conjunction with finite element analysis to calibrate and validate an anisotropic plasticity model. The fracture behavior was then evaluated with a combined experimental/computational approach to probe the strain to failure as a function of stress state (stress triaxiality and Lode angle parameter) of the material. Six existing fracture models were then calibrated using the experimental data, and their ability to capture and predict the anisotropic stress state dependent fracture of L-PBF Ti-6Al-4V will be discussed. |