Abstract
Microstructural analysis and micro-hardness measurements were performed on different planes of 316L stainless steel fabricated by direct metal laser sintering (DMLS) technique. A fine cellular network was observed within the steel microstructure, where morphology of most cells changed from columnar on XZ-plane (vertical section) to equiaxed on XY-plane (horizontal section). Correspondingly, morphology of most grains was found to alter from columnar for the XZ-plane to equiaxed in the case of the XY-plane. Moreover, X-ray diffraction (XRD) analysis revealed a fully austenitic structure for both the planes. The average micro-hardness value for the XZ-plane and XY-plane was insignificantly (≈ 3%) different, which was attributed to the random grain orientation observed on both the planes. However, the average micro-hardness of the DMLS-fabricated 316L stainless steel in this contribution was approximately 25% higher than that of the as-cast one.
Recommended Citation
M. Ghasri-Khouzani et al., "Direct Metal Laser-sintered Stainless Steel: Comparison Of Microstructure And Hardness Between Different Planes," International Journal of Advanced Manufacturing Technology, vol. 95, no. 9 thru 12, pp. 4031 - 4037, Springer, Apr 2018.
The definitive version is available at https://doi.org/10.1007/s00170-017-1528-y
Department(s)
Mechanical and Aerospace Engineering
Keywords and Phrases
Additive manufacturing; DMLS; Hardness; Microstructure; Stainless steel
International Standard Serial Number (ISSN)
1433-3015; 0268-3768
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 Springer, All rights reserved.
Publication Date
01 Apr 2018
Comments
Air Force Research Laboratory, Grant 4047