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Simulation of Ti-6Al-4V Additive Manufacturing Using Coupled Physically Based Flow Stress and Metallurgical Model
Swerim AB, Heating and Metalworking, Luleå, Sweden.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.ORCID-id: 0000-0002-0053-5537
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.ORCID-id: 0000-0002-2544-9168
2019 (engelsk)Inngår i: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 12, nr 23, artikkel-id 3844Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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

sted, utgiver, år, opplag, sider
MDPI, 2019. Vol. 12, nr 23, artikkel-id 3844
Emneord [en]
dislocation density, vacancy concentration, Ti-6Al-4V, additive manufacturing, directed energy deposition
HSV kategori
Forskningsprogram
Materialmekanik
Identifikatorer
URN: urn:nbn:se:ltu:diva-77109DOI: 10.3390/ma12233844PubMedID: 31766563OAI: oai:DiVA.org:ltu-77109DiVA, id: diva2:1376204
Merknad

Validerad;2019;Nivå 2;2019-12-09 (johcin)

Tilgjengelig fra: 2019-12-09 Laget: 2019-12-09 Sist oppdatert: 2019-12-09bibliografisk kontrollert

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Babu, BijishLundbäck, AndreasLindgren, Lars-Erik

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