| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Microstructure, Defects, and Properties
|
| Presentation Title |
Additively Manufactured M300 Maraging Steel – Process Monitoring, Microstructure, and Performance Evaluation |
| Author(s) |
Puskar Pathak, Aniqa Ibnat Lim, Mohan Sai Kiran Kumar Yadav Nartu, Francisco Carlos Robles Hernandez, Venkat Selvamanickam |
| On-Site Speaker (Planned) |
Puskar Pathak |
| Abstract Scope |
Laser-based additive manufacturing (AM) has gained significant attention as it enables fabrication of complex engineering parts with tailored material properties. In this work, we utilize the direct energy deposition (DED) based AM technique to investigate the microstructure and performance of M300 maraging steel. In-situ infrared (IR) camera was used to monitor the melt pool for process control, yielding > 99.8% dense parts in the as-printed state. Different heat treatments were carried out on the as-printed parts, and the attended microstructure and mechanical properties were studied. A cellular and columnar dendritic structure microstructure with martensite and austenite phases was observed without significant chemical segregation. Compared with conventionally manufactured counterparts, the heat-treated M300 parts exhibited enhanced hardness and indentation modulus. Internal defect analysis of the as-printed parts using X-ray computed tomography (CT) revealed no internal cracks or inclusions, only a slight trace of gas-induced and a lack of fusion pores was noted. |