About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
2020 Technical Division Student Poster Contest
|
Presentation Title |
SPG-66: Improvement on Anisotropy and Mechanical Behaviors of IN718 Processed by Selective Laser Melting by CoAl2O4 Inoculant Addition |
Author(s) |
I-Ting Ho, Tzu-Hou Hsu, Yao-Jen Chang, Chen-Wei Li, Kai-Chun Chang, Sammy Tin, Koji Kakehi, An-Chou Yeh |
On-Site Speaker (Planned) |
I-Ting Ho |
Abstract Scope |
This study aims to investigate the effects of minor addition of CoAl2O4 inoculants on crystallographic texture and mechanical properties of a superalloy – Inconel 718 (IN718), processed by selective laser melting (SLM). IN718 powder was blended with 0.2 wt. % of CoAl2O4 flakes uniformly. After SLM process, these particles were found to affect the crystallographic texture and reduce the anisotropic grain structure. Furthermore, there was a dispersion of nano-oxides in the microstructure induced by reaction between IN718 and CoAl2O4 particles; finer grain structure could be achieved after post-heat-treatment. Through the tensile testing, it could be observed that the inoculant addition had significantly minimized the elastic anisotropy and enhanced the tensile strength. This work has demonstrated the beneficial effect of inoculant in additive manufactured superalloys. |
Proceedings Inclusion? |
Undecided |