About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Unveiling Creep-Induced Microstructural Changes in 3D-Printed ODS Alloys via Advanced SEM-Based Characterization. |
| Author(s) |
Subham Chattoraj, Johan Westraadt, Andreas Bezold, Timothy M Smith, Michael J Mills |
| On-Site Speaker (Planned) |
Subham Chattoraj |
| Abstract Scope |
Oxide dispersion strengthened (ODS) alloys have remarkable high-temperature creep properties, however, their wide scale application has been limited by processing and scalability challenges. Recent advancements in additive manufacturing provided a scalable pathway to fabricate ODS-strengthened alloys via laser powder bed fusion, resulting in an optimized solid-solution ODS alloy, called GRX-810, with grain boundary carbides and exceptional high-temperature creep strengths. While TEM is commonly used to analyse the oxide and carbide distributions within the metal matrix, it is limited by the local area and analyzing complexity. Here, we present an alternative SEM-based approach to investigate the evolution of oxide and carbide distributions and dislocation structures in the crept sample using advanced SEM techniques including ECCI, EDS, EBSD, RKD, TKD and high-resolution imaging. Through this multimodal approach, we correlate the creep behaviour with the evolution of these microstructural features to rationalize the exceptional high-temperature strength of GRX-810. |