| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals:
ICME Gaps: Material Property and Validation Data to Support Certification
|
| Presentation Title |
An Analysis of the Dislocation Density of Inconel 718 Additive Manufacturing Powder |
| Author(s) |
Colby Azersky, Sangho Jeon, Peggy Cebe |
| On-Site Speaker (Planned) |
Colby Azersky |
| Abstract Scope |
Understanding and controlling the atomic dislocation density of metallic powders used for additive manufacturing processes is vital for the production of high fidelity additively manufactured parts. One-dimensional line defects are particularly important to the material properties of an additively manufactured part because these defects control yield stress and deformation behavior. Since these dislocations were introduced to the powder during the initial solidification, it is critical to investigate how undercooling and cooling rate affects the amount of internal dislocations. When these metallic powders are manufactured, their rapid cooling subjects them to significant undercooling during the solidification process. Multiple size ranges of Inconel 718 powder were evaluated using two different diffractometers to determine the relationship between cooling rate, undercooling and dislocation density. Line profile analysis of the X-ray diffraction patterns showed a significant increase in dislocation density at smaller particle sizes for both facilities. |