About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
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| Presentation Title |
A Micromechanical Comparison of Wrought and Additively Manufactured Inconel 718 Subject to High Strain Rates |
| Author(s) |
Katie Bruggeman, Anthony Palazotto, Dan Young |
| On-Site Speaker (Planned) |
Katie Bruggeman |
| Abstract Scope |
Additively Manufactured nickel-based superalloys have potential for use in high strain-rate applications. However, most mechanical constitutive data for Inconel 718 (IN718) is for the wrought microstructure. Wrought and additively manufactured (AM) specimens are studied micromechanically after being subject to high strain rates. Scanning Electron Microscopy (SEM), Electron Back Scattering Deflection (EBSD), and Vickers microhardness analyses are utilized for comparisons after subjecting the materials to Taylor impact testing at 300 and 700 psi. Three regions of each Taylor specimen are considered for analysis: impact, middle, and back. Current results show Vickers microhardness values for both Wrought and AM IN718 increase in comparison to their control material counterparts, with AM having a slightly larger hardness value than wrought. SEM and EBSD analysis conclude the grain structure and crystallographic deformations are more prominent for specimens tested near the impact region under higher pressures. Johnson-Cook coefficients are also extracted to facilitate future predictive modeling. |