Simulation of Ti-6Al-4V Additive Manufacturing Using Coupled Physically Based Flow Stress and Metallurgical Model

Document identifier:
Access full text here:10.3390/ma12233844
Keyword: Engineering and Technology, Materials Engineering, Other Materials Engineering, Teknik och teknologier, Materialteknik, Annan materialteknik, Dislocation density, Vacancy concentration, Ti-6Al-4V, Additive manufacturing, Directed energy deposition, Material Mechanics, Materialmekanik
Publication year: 2019
Relevant Sustainable Development Goals (SDGs):
SDG 9 Industry, innovation and infrastructure
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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 α -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


Bijish Babu

Swerim AB, Heating and Metalworking, Luleå, Sweden
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Andreas Lundbäck

Luleå tekniska universitet; Material- och solidmekanik
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Lars-Erik Lindgren

Luleå tekniska universitet; Material- och solidmekanik
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