Investigation of in-situ alloying of maraging Steel M789 via direct energy deposition
M789 maraging steel is a low-alloy, high-strength steel widely used in corrosive environments. This study investigated the in-situ alloying of Maraging steel M789 via Direct Energy Deposition (DED). The DED method is a form of additive manufacturing (AM) that employs laser or electron beams to di...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
Nanyang Technological University
2023
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| Online Access: | https://hdl.handle.net/10356/167168 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | M789 maraging steel is a low-alloy, high-strength steel widely used in corrosive
environments. This study investigated the in-situ alloying of Maraging steel M789 via Direct
Energy Deposition (DED). The DED method is a form of additive manufacturing (AM) that
employs laser or electron beams to dissolve and fuse metal particles onto a substrate.
In this study, maraging steel M789 was alloyed with varying amounts of 316L alloy to
produce TRIP-maraging steel. The DED fabricated samples were then characterized using
microstructural analysis techniques, such as Scanning Electron Microscopy (SEM) equipped with
an electron backscatter diffraction detector (EBSD). Further characterization, such as tensile tests
and X-ray diffraction (XRD) analyses were conducted.
The findings demonstrated that the addition of 316L to M789 maraging steel enhanced the
alloy's strength, while maintaining high strength. However, in-situ alloying resulted in
microstructural changes, such as the formation of austenite. Overall, this investigation
demonstrates the viability of in-situ alloying of maraging steel M789 via DED to produce alloys
with enhanced properties for specific marine and offshore too. |
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