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Article
Direct Metal Laser-sintered Stainless Steel: Comparison Of Microstructure And Hardness Between Different Planes
International Journal of Advanced Manufacturing Technology
  • M. Ghasri-Khouzani
  • H. Peng
  • R. Attardo
  • P. Ostiguy
  • J. Neidig
  • R. Billo, Missouri Unviersity of Science and Technology
  • D. Hoelzle
  • M. R. Shankar
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.

Department(s)
Mechanical and Aerospace Engineering
Comments

Air Force Research Laboratory, Grant 4047

Keywords and Phrases
  • Additive manufacturing,
  • DMLS,
  • Hardness,
  • Microstructure,
  • Stainless steel
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 Springer, All rights reserved.
Publication Date
4-1-2018
Publication Date
01 Apr 2018
Citation Information
M. Ghasri-Khouzani, H. Peng, R. Attardo, P. Ostiguy, et al.. "Direct Metal Laser-sintered Stainless Steel: Comparison Of Microstructure And Hardness Between Different Planes" International Journal of Advanced Manufacturing Technology Vol. 95 Iss. 9 thru 12 (2018) p. 4031 - 4037 ISSN: 1433-3015; 0268-3768
Available at: http://works.bepress.com/richard-billo/40/