| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
A-68: On The Effect of Building Direction on the Microstructure and Grain Morphology of a Selective Laser Melted Maraging Stainless Steel |
| Author(s) |
Mehdi Sanjari, Amir Hadadzadeh, Ayda Shahriairi, Saeed Tamimi, Hadi Pirgazi, Babak Shalchi Amirkhiz, Leo Kestens, Mohsen Mohammadi |
| On-Site Speaker (Planned) |
Mehdi Sanjari |
| Abstract Scope |
In this study, cylindrical rods of a low carbon Fe-Cr-Ni-Al maraging stainless steel (CX) were fabricated through selective laser melting (SLM) technique in both vertical and horizontal directions. The microstructure and grain morphology of the as-built sample were studied using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). It was observed that in both vertical and horizontal directions the microstructure of the as-built sample consists of columnar dendrites aligned in the building direction because of the fast-directional cooling presents in the SLM process. However, the microstructural studies revealed that by changing the building direction from vertical to horizontal, both dendritic and grain structures have a tendency to change from columnar to equiaxed. Furthermore, the TEM results showed that different volume fractions of austenite and martensite phases were detected in both directions resulting from complex heat history and wide temperature range during the SLM process. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |