Temperature and Microstructure Evolution in Gas Tungsten Arc Welding Wire Feed Additive Manufacturing of Ti-6Al-4V

Document identifier: oai:DiVA.org:ltu-76788
Access full text here:10.3390/ma12213534
Keyword: Engineering and Technology, Materials Engineering, Other Materials Engineering, Teknik och teknologier, Materialteknik, Annan materialteknik, Additive manufacturing, Titanium, Ti-6Al-4V, Microstructural modeling, Metal deposition, Finite element method, Material Mechanics, Materialmekanik, Engineering Materials
Publication year: 2019
Relevant Sustainable Development Goals (SDGs):
SDG 9 Industry, innovation and infrastructure
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Abstract:

In the present study, the gas tungsten arc welding wire feed additive manufacturing process is simulated and its final microstructure predicted by microstructural modelling, which is validated by microstructural characterization. The Finite Element Method is used to solve the temperature field and microstructural evolution during a gas tungsten arc welding wire feed additive manufacturing process. The microstructure of titanium alloy Ti-6Al-4V is computed based on the temperature evolution in a density-based approach and coupled to a model that predicts the thickness of the α lath morphology. The work presented herein includes the first coupling of the process simulation and microstructural modelling, which have been studied separately in previous work by the authors. In addition, the results from simulations are presented and validated with qualitative and quantitative microstructural analyses. The coupling of the process simulation and microstructural modeling indicate promising results, since the microstructural analysis shows good agreement with the predicted alpha lath size.

Authors

Corinne Charles Murgau

Department of Engineering Science, University West, Trollhättan, Sweden
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Andreas Lundbäck

Luleå tekniska universitet; Material- och solidmekanik
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Pia Åkerfeldt

Luleå tekniska universitet; Materialvetenskap
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Robert Pederson

Department of Engineering Science, University West, Trollhättan, Sweden. GKN Aerospace Engine Systems, Trollhättan, Sweden
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