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Modified cellular automaton simulation of metal additive manufacturing
- Source :
- Materials Transactions. 62(6):864-870
- Publication Year :
- 2021
- Publisher :
- The Japan Institute of Metals and Materials, 2021.
-
Abstract
- Kubo J., Koizumi Y., Ishimoto T., et al. Modified cellular automaton simulation of metal additive manufacturing. Materials Transactions 62, 864 (2021); https://doi.org/10.2320/matertrans.MT-M2021009.<br />Metal additive manufacturing (AM) technologies are attracting attentions not only as a fabrication process of complicated threedimensional parts but also as microstructure controlling processes. In powder bed fusion (PBF)-type AM, crystallographic texture can be controlled by scanning strategies of energy beam. To optimize microstructures, computer simulations for predicting microstructures play very important roles. In this work, we have developed simulation programs to explain the mechanism of the crystal orientation control. First, we simulated the shape of melt pool by analyzing the heat transfer using apparent heat conductivity when the penetration of laser beam through keyholes was taken into consideration because of the evaporation and accompanying convections. It was assumed that the primary crystal growth direction can be determined by the temperature gradient, and the crystals grow keeping the growth direction as generally recognized. The shapes of simulated melt pools agree well with experimental observations. The modified cellular automaton simulations successfully reproduced two typical textures with different preferential orientations along the building directions of (100) and (110) when the bidirectional scanning with and without a rotation of 90°, respectively, was accomplished between the layers.
- Subjects :
- Crystallographic texture
Materials science
Specific heat
Additive manufacturing
Mechanical Engineering
Metals and Alloys
Condensed Matter Physics
Cellular automaton
Metal
Mechanics of Materials
visual_art
Materials Chemistry
visual_art.visual_art_medium
General Materials Science
Melt pool
Biological system
Grain orientation
Simulation
Subjects
Details
- Language :
- English
- ISSN :
- 13459678
- Volume :
- 62
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- Materials Transactions
- Accession number :
- edsair.doi.dedup.....66dccb7a56a2316d8450a95accc73f1d