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Título:
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Metal additive manufacturing: process, conception and post-treatments
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Autor/a:
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Briantais, Lucas
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Resistència de Materials i Estructures a l'Enginyeria; Ayneto Gubert, Javier |
Abstract:
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This research project is a global study of the metal additive manufacturing from the
optimization of the design phase to the improvement of the final state of the parts with
finishing treatments and passing by the adjustment of the production process.
It starts with a state of art of the technologies, materials and industrial projects leading to
focus on the laser melting of a metallic powder bed.
The study of the manufacturing process has been realised focusing on the laser’s
parameters: its speed and power. The optimization has been made with the objective of
improving the surface state of the parts as long as the production was concerning dental
implants in Cobalt-Chromium alloy.
The design phase has been focused on with the topological optimization method applied to a
suspension’s triangle in stainless steel. This method leading to a reduction of the mass
and/or gain of stiffness of the part is used a lot with the additive manufacturing as long as it
permits complex geometries. It although has to be linked to real tests to get information like
the mechanical characteristics necessary for the simulation and to validate or not the
resistance of the new geometry.
The improvement of the final state of the parts can be related to the surface aspect with the
shot peening process but although to the internal state of the part with post heat treatments.
Here various heat treatments have been realised on a stainless steel, an aluminium alloy and
a Nickel based superalloy to reduce the internal residual stresses and improve the
homogeneity of the parts. Different macro and microscopic characterisations have been
realised to validate or not the effect of the treatments on the quality of the samples to avoid
their deformation and break and to try to approach the characteristics of a part issued from a
more classical metal manufacturing process |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Metals -- Testing -Metalls -- Proves |
Derechos:
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http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Tipo de documento:
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Trabajo fin de máster |
Editor:
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Universitat Politècnica de Catalunya
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