Reference : Processing of alloy Ti-6Al-4V and of stainless steel 316L by Laser Beam Melting
Scientific congresses and symposiums : Unpublished conference/Abstract
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/167458
Processing of alloy Ti-6Al-4V and of stainless steel 316L by Laser Beam Melting
English
Mertens, Anne mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Science des matériaux métalliques >]
Paydas, Hakan mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Science des matériaux métalliques >]
Reginster, Sylvie mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Science des matériaux métalliques >]
Contrepois, Quentin mailto []
Dormal, Thierry mailto []
Lemaire, Olivier mailto []
Lecomte-Beckers, Jacqueline mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Science des matériaux métalliques >]
May-2014
No
Yes
International
2nd Spring Meeting, IAP 7/21, Intermate "Multiscale Mechanics of Interface Dominated Materials"
12-13 Mai 2014
Université de Gand
Gand
Belgique
[en] Laser Beam Melting ; Mechanical Properties ; Thermophysical properties ; Ti alloys ; Stainless Steel ; LIMARC ; Additive Manufacturing
[en] Additive manufacturing processes such as Selective Laser Melting (SLM) appear very promising in view of the economic production of near-net-shape, complex and (almost) fully dense parts from metallic materials such as Ti alloys and stainless steels. Practically, in SLM, a metallic powder is deposited layer-by-layer in a powder bed and then molten locally according to the desired shape. An important feature of this process is that the structure undergoes an ultra-fast cooling once the beam leaves the working zone, thus giving rise to strongly out-of-equilibrium microstructures. In the case of Ti alloy Ti-6Al-4V, in particular, the microstructural anisotropy resulting from the epitaxial growth of the newly deposited layer on the material previously solidified has been shown to exert a very strong influence on the mechanical properties [1]
In the present work, the thermophysical behaviour of Ti-alloy Ti-6Al-4V and of stainless steel 316L has been characterised in details, in order to reach a better understanding of the phenomena controlling the microstructures and mechanical properties of parts. In particular, the thermal conductivity of Ti-alloy Ti-6Al-4V and of stainless steel 316L at high temperature has been determined by combining dilatometry, Differential Scanning Calorimetry (DSC) and laser flash diffusivimetry based on Laplace’s equation. Since Ti-alloy Ti-6Al-4V and stainless steel 316L exhibit quite different physical behaviours, their careful comparison is shown to shed more light into the role of phenomena such as epitaxial growth, out-of-equilibrium phase transformations and/or internal stresses in the additive manufacturing of metallic materials.
Interuniversity Attraction Poles Programme initiated by the Belgian Science Policy Office, contract IAP7/21"INTEMATE"
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/167458

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