About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing for Energy Applications V
|
Presentation Title |
Additive Manufacturing of Inconel 718 + SiC with Enhanced Tensile Strength and Uniform Ductility |
Author(s) |
Alexander David O'Brien, Emre Tekoglu, Anastasios John Hart, Wen Chen, Ju Li |
On-Site Speaker (Planned) |
Alexander David O'Brien |
Abstract Scope |
We report the additive manufacturing of a nickel superalloy metallic matrix composite (Ni-MMC) using Selective Laser Melting. Inconel 718 with 2 vol% SiC nanowires were prepared by ball milling of nanowires and base alloy powder, which was found to produce a homogeneous distribution of SiC on Inconel surfaces. Analysis revealed dissolution of nanowires during laser powder bed fusion, leading to in-situ formation of Nb and Ti-based silicide and carbide nanoparticles. The SiC dissolution and resulting nanoparticles were observed to improve the material microstructure, reducing cracks/pores and decreasing average grain size after printing. Mechanical characterization of the printed Ni-MMCs after standard heat-treatment revealed notable increases in the hardness, ultimate tensile strength, and uniform tensile ductility. We believe this presents a simple and effective method for improving the usability of high-temperature materials prepared by additive manufacturing that may prove important in the face of ever-harshening environments in energy and propulsion applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, Powder Materials |