| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Solid-State Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Microstructural Characterization of Maraging 300 Steel Fabricated by Select Laser Melting |
| Author(s) |
Johnnatan Rodriguez, Elizabeth Hoyos, Fabio Conde, André Luiz Jardini Munhoz, Julian Avila |
| On-Site Speaker (Planned) |
Johnnatan Rodriguez |
| Abstract Scope |
Additive manufacturing has been used in different industries like aerospace, medical and automotive. In the aerospace, materials with high performance are needed to fulfill the requirements of the industry. Maraging steels are among the materials widely used due to its high strength and toughness. In this work, a Maraging 300 steel powder was used to produce components by SLM. Two heat treatments were applied to study the martensite-to-austenite reversion, HT1: 480 °C/3 h and HT2: 980 °C/1h + 2x690 °C/5 min + 480 °C/6h. The microstructural characterization was assessed by OM, SEM and EBSD. As-built condition revealed a cellular and dendritic morphology with segregation of Ti, Ni and Mo to the grain boundaries. Direct aging treatment does not erase the typical AM morphology, but a solubilization at 980 °C/1h was capable of fully recrystallize the microstructure. The EBSD analysis showed the increase of reverted austenite for the HT2. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, |