About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Microstructure and Mechanical Properties Correlation of Additively Manufactured IN939 Superalloy |
| Author(s) |
Md Shahwaz, Merve Nur Dogu, Hengfeng Gu, Dermot Brabazon, Indrani Sen |
| On-Site Speaker (Planned) |
Md Shahwaz |
| Abstract Scope |
This study focuses on understanding the microstructural evolution and mechanical behavior of Inconel 939, a Ni-based superalloy, processed via powder bed fusion-laser beam (PBF-LB). While conventionally produced IN939 is well-established for high-temperature applications, additive manufacturing (AM) is gaining attention due to its capability to fabricate complex geometries. However, AM significantly alters the microstructure compared to conventional methods. This work systematically examines the top and bottom sections of the PBF-LB IN939 build, revealing the presence of the γ phase in both regions and higher residual stress at the bottom. Hardness measurements indicate refined microstructure and higher hardness at the top. Tensile and compression tests conducted at room temperature, 750 °C, and 850 °C show distinct deformation behavior, including a yield strength anomaly with increasing temperature. These findings offer critical insights into the processing–structure–property relationships of AM IN939, aiding its qualification for high-temperature aerospace applications. |