About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
Presentation Title |
Microstructural Evolution in Maraging Steels: From Powder to Additive Manufacturing |
Author(s) |
Seyedamirreza Shamsdini, Mohsen Mohammadi |
On-Site Speaker (Planned) |
Seyedamirreza Shamsdini |
Abstract Scope |
18Ni-300 maraging steel was studied to investigate the microstructural evolution from powder particles to additively manufactured samples using the laser powder bed fusion technique. The gas atomized powder was studied, powder particles were characterized, and the powder size distribution was measured using a mapping technique. X-ray diffraction technique was used to measure the phase fraction in powder and additively manufactured samples. Martensite and austenite phases were depicted in XRD studies. The manufacturing process proved to transform the austenite phase into martensite. Pole figures and orientation distribution functions were then shown from the XRD studies. The manufacturing process resulted in orientational grain structure with respect to building direction. Specimens were then subjected to tensile plastic deformation, and the phase fractions and the grain orientation change due to deformation were studied. Results showed that regardless of the initial texture implied through the manufacturing process, the deformation induces texture regarding the load direction. |