Evolution of solidification texture during additive manufacturing
By H. Wei, Jyoti Mazumder, T. Debroy. Scientific Reports, 2015
483 citations recorded by the source corpus.
Striking differences in the solidification textures of a nickel based alloy owing to changes in laser scanning pattern during additive manufacturing are examined based on theory and experimental data. Understanding and controlling texture are important because it affects mechanical and chemical properties. Solidification texture depends on the local heat flow directions and competitive grain growth in one of the six <100> preferred growth directions in face centered cubic alloys. Therefore, the heat flow directions are examined for various laser beam scanning patterns based on numerical modeling of heat transfer and fluid flow in three dimensions. Here we show that numerical modeling can not only provide a deeper understanding of the solidification growth patterns during the additive manufacturing, it also serves as a basis for customizing solidification textures which are important for properties and performance of components.
Subfields: Automotive Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/f3e0ad28157144f38e429b98d472e4036d854713
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Citations in the corpus
- Finite interface dissipation phase field modeling of Ni–Nb under additive manufacturing conditions (2019, background): “The growth rate is geometrically derived as the projection of laser velocity v⃗ onto the normal vector of the solidification front using the angle (θ) between said vectors [61, 62]:”
- Structure, Texture and Phases in 3D Printed IN718 Alloy Subjected to Homogenization and HIP Treatments (2017, unknown): “The high power density, low laser power and high scanning speed were claimed to be beneficial for the columnar grain growth [19].”
- Microstructure, Solidification Texture, and Thermal Stability of 316 L Stainless Steel Manufactured by Laser Powder Bed Fusion (2018, background): “Experimentally, the possibility to control microstructure through adjustments of the scanning strategy and process parameters has been presented for DED Ni-base alloys [34,50] and LPBF Ni- [51,52],”