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A u g u s t 0 5 - 0 6 , 2 0 1 9
P a r i s , F r a n c e
Page 27 American Journal of Computer Science and Information Technology
ISSN: 2349-3917 3D Printing 2019
Euroscicon Conference on
3D Printing
Single track printing is one of the basic units for additive manufacturing
technique, which has significance on the process optimization and quality
improvement of the final printed products. Single track printing of stainless
steel 316L was studied and the morphology and microstructure of the molten
pool were analyzed. The result showed that columnar grains were easy to grow
perpendicular to the boundary of the molten pool due to the large temperature
gradient, whereas equiaxed grains were prone to appear far away from the
boundary. The cell spacing decreased with scanning speed increased, however,
it did not change much with different laser power. The lattice parameters
decreased with the decrease of laser volumetric energy density due to the
phase reorganization. The microstructure of the printed pieces was anisotropic
with equiaxed and columnar dendritic substructures alternative for the top
surface. However, for the side surface, columnar dendritic substructures could
grow across the interlayers and even through the whole surface.
Biography
Lina Ji has completed her PhD in condensed matter physics at
the age of 29 years from Institute of Phyics, Chinese Academy
of Sciences and postdoctoral studies from Singapore National
UniversityandUniversityofMinnesota.After that,she joined the
3DprintingCenter inChongqing InstituteofGreenand Intelligent
Technology, Chinese Academy of Sciences as an associate
professor. Her research is mainly on additive manufacturing
of refractory materials and metal-matrix composites. She has
published more than 25 papers in top journals.
,
Microstructure of single track and bulk stainless steel 316L
fabricated by laser powder bed fusion
Lina Ji1,2 , Sen Wang 1,2, Jiquan Liu 1,2, Wenjie Wu1,2 , Shuqian Fan1,2
1Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, CN
2Chongqing Key Laboratory of Additive Manufacturing Technology and Systems, CN
Lina Ji et al., Am J Compt Sci Inform Technol 2019, Volume 07