About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Development of Powders
|
| Presentation Title |
Influence of Atmospheric Environments on Spark Plasma Sintering Kinetics, Densification, and Microstructural Evolution in Inconel 718 and 316L Stainless Steel Alloys |
| Author(s) |
Seong Gyu Chung, Hwasung Yeom, Kumar Sridharan, Jungwook Cho |
| On-Site Speaker (Planned) |
Seong Gyu Chung |
| Abstract Scope |
This study aims to control interfacial stability through enhanced inclusion formation under a nitrogen atmosphere, compared to a conventional argon environment. Emphasis is placed on phase evolution and interfacial modification induced by nitrogen processing. Microstructural analysis revealed that nitrides formed under nitrogen were more uniformly distributed, particularly along grain boundaries, than those produced in argon. Although the measured hardness showed minimal variation between the two atmospheres, the presence of finely dispersed nitrides contributed to improved isotropy and mitigation of interface-driven anisotropy. The combined effects of uniform nitride dispersion and grain boundary pinning enhanced interfacial cohesion and thermal stability, especially within sintered systems. These improvements are attributed to the stabilization of grain boundary structures and suppression of localized degradation. The findings provide valuable insight into the design of robust interfacial architectures and are expected to support the development of compatible joint structures between dissimilar alloys. |