About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing Fatigue and Fracture: Effects of Surface Roughness, Residual Stress, and Environment
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Presentation Title |
Predicting the Influence of Inherent Pores on Mechanical Properties of Additive-Manufactured Ti6Al4V via an Empirical Model |
Author(s) |
Mu Gao |
On-Site Speaker (Planned) |
Mu Gao |
Abstract Scope |
In this study, a novel “criticality” parameter was proposed, able to examine the pore state of an AM-ed part from its 2D surface and fracture surface via Optical and Scanning Electron Microscopy. From the porosity and aspect ratio measured and calculated, the mechanical properties can be predicted from simple empirical equation. Other than tensile properties, ductility and Charpy toughness can also be predicted directly from examining individual defects in 2D plane perpendicular to load, saving time and economical cost from μ-CT scan and complex modelling. The usage of criticality, concerning pore shape effect along with porosity, bridged the difference of samples built from different AM parameters in terms of mechanical behaviour due to presence of lack-of-fusion and keyhole pores inherent in AM-ed metal parts, to porosity up to 15%. This study of the relationship between the ubiquituous pores and mechanical properties would contribute to the confident application of AM-ed parts. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Titanium |