Simulation of Ti-6Al-4V Additive Manufacturing Using Coupled Physically Based Flow Stress and Metallurgical Model
1
Swerim AB, Heating and Metalworking Box 812, SE-971 25 Luleå, Sweden
2
Mechanics of Sold Materials, Luleå University of Technology, SE-971 87 Luleå, Sweden
*
Author to whom correspondence should be addressed.
Materials 2019, 12(23), 3844; https://doi.org/10.3390/ma12233844
Received: 3 October 2019
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Revised: 14 November 2019
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Accepted: 18 November 2019
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Published: 21 November 2019
(This article belongs to the Special Issue Progress in Metal Additive Manufacturing and Metallurgy)
Simulating the additive manufacturing process of Ti-6Al-4V is very complex due to the microstructural changes and allotropic transformation occurring during its thermomechanical processing. The -phase with a hexagonal close pack structure is present in three different forms—Widmanstatten, grain boundary and Martensite. A metallurgical model that computes the formation and dissolution of each of these phases was used here. Furthermore, a physically based flow-stress model coupled with the metallurgical model was applied in the simulation of an additive manufacturing case using the directed energy-deposition method. The result from the metallurgical model explicitly affects the mechanical properties in the flow-stress model. Validation of the thermal and mechanical model was performed by comparing the simulation results with measurements available in the literature, which showed good agreement.
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Keywords:
dislocation density; vacancy concentration; Ti-6Al-4V; additive manufacturing; directed energy deposition
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MDPI and ACS Style
Babu, B.; Lundbäck, A.; Lindgren, L.-E. Simulation of Ti-6Al-4V Additive Manufacturing Using Coupled Physically Based Flow Stress and Metallurgical Model. Materials 2019, 12, 3844. https://doi.org/10.3390/ma12233844
AMA Style
Babu B, Lundbäck A, Lindgren L-E. Simulation of Ti-6Al-4V Additive Manufacturing Using Coupled Physically Based Flow Stress and Metallurgical Model. Materials. 2019; 12(23):3844. https://doi.org/10.3390/ma12233844
Chicago/Turabian StyleBabu, Bijish, Andreas Lundbäck, and Lars-Erik Lindgren. 2019. "Simulation of Ti-6Al-4V Additive Manufacturing Using Coupled Physically Based Flow Stress and Metallurgical Model" Materials 12, no. 23: 3844. https://doi.org/10.3390/ma12233844
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