About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
|
Materials
|
Presentation Title |
Evaluation of Early Fatigue Damage Detection in Additively Manufactured AlSi10Mg |
Author(s) |
Susheel Dharmadhikari, Amrita Basak |
On-Site Speaker (Planned) |
Susheel Dharmadhikari |
Abstract Scope |
This paper presents two different methods for fatigue damage detection in notched AlSi10Mg specimens fabricated on a ProX-320 laser powder bed fusion equipment using recycled AlSi10Mg powders. The fatigue damage evolution is monitored using two heterogeneous sensors, namely, the force-displacement sensor and a confocal microscope. The force-displacement sensor captures the global stress-strain behavior of the specimens; however, it provides no information about the local damage near the notch. The force-displacement data, which shows a hysteresis-like behavior, is calibrated using a confocal microscope focused inside the notch of the specimen so that the onset of fatigue crack initiation can be detected at a crack opening displacement (COD) of ~10 micron. Using the force-displacement signal data, the energy dissipation rate and the material stiffness per cycle are computed. The results show a detection accuracy of 100% and 99.14% for the energy dissipation rate and material stiffness per cycle, respectively. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |