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

Charles Murgau, CorinneHögskolan Väst,Avdelningen för svetsteknologi (SV),PTW (författare)

Validerad;2019;Nivå 2;2019-11-20 (johcin)
Ingår i avhandlingFunding: European 6th Framework Program through the research project VERDI (Virtual Engineering for Robust manufacturing with Design Integration). Swedish National Space Board through the NRFP2 program (Swedish National Space Research Program)
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.

Lundbäck, AndreasLuleå tekniska universitet,Material- och solidmekanik,Division of Mechanics of Solid Materials, Luleå University of Technology, 971 81 Luleå, Sweden(Swepub:ltu)andlun (författare)
Åkerfeldt, PiaLuleå tekniska universitet,Materialvetenskap,Division of Materials Science, Luleå University of Technology, 971 81 Luleå, Sweden(Swepub:ltu)piaake (författare)
Pederson, RobertDepartment of Engineering Science, University West, Trollhättan, Sweden. GKN Aerospace Engine Systems, Trollhättan, Sweden,GKN Aerospace Engine Systems, 461 81 Trollhättan, Sweden (författare)
Högskolan VästAvdelningen för svetsteknologi (SV) (creator_code:org_t)

Av författaren/redakt...: Charles Murgau, ...; Lundbäck, Andrea ...; Åkerfeldt, Pia; Pederson, Robert

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