| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Processing, Microstructure and Material Properties of Titanium-based Materials
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| Presentation Title |
Use of Small Geometry Specimens to Determine the Fracture and Fatigue Crack Growth Properties of Additively Manufactured Ti-6Al-4V via DED Technique for Repair |
| Author(s) |
Sammy A. Ojo, Sulochana Shrestha, Joseph El Rassi, Manigandan Kannan, Gregory Morscher, Andrew Gyekenyesi, Onome Scott-Emuakpor |
| On-Site Speaker (Planned) |
Sammy A. Ojo |
| Abstract Scope |
Ti-6Al-4V is a critical material for aerospace applications where fatigue crack growth and fracture properties are considered as critical mechanical properties. Repair methodologies are being considered for complex parts such as an integrally blade rotor via directed energy deposition additive manufacturing. A study was undertaken to assess the anisotropic fracture and fatigue crack growth properties of Ti-6Al-4V fabricated by DED AM method using notched compact test specimens. These specimens were cut from DED repaired and mildly heat-treated specimens. Because these small, sub-specimens of pure DED AM material were machined from 50/50 stock/DED AM repaired coupons from another study. Full field displacements were measured via digital image correlation while direct current potential drop was incorporated to monitor crack growth. To gain insight into failure mechanisms and microscopic features of the studied materials, fractured surfaces and polished section were examined, thereby, establishing a correlation between the resultant mechanical properties and microstructural features. |