Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/5659
Título
Cold Isostatic pressing to improve the mechanical performance of additively manufactured metallic components
Autor
Publicado en
Materials. 2019, V. 12, n. 15, 2495
Editorial
MDPI
Fecha de publicación
2019-08
DOI
10.3390/ma12152495
Resumen
Additive manufacturing is becoming a technique with great prospects for the production of
components with new designs or shapes that are difficult to obtain by conventional manufacturing
methods. One of the most promising techniques for printing metallic components is binder jetting,
due to its time efficiency and its ability to generate complex parts. In this process, a liquid binding
agent is selectively deposited to adhere the powder particles of the printing material. Once the metallic
piece is generated, it undergoes a subsequent process of curing and sintering to increase its density
(hot isostatic pressing). In thiswork,we propose subjecting themanufactured component to an additional
post-processing treatment involving the application of a high hydrostatic pressure (5000 bar) at room
temperature. This post-processing technique, so-called cold isostatic pressing (CIP), is shown to increase
the yield load and the maximum carrying capacity of an additively manufactured AISI 316L stainless
steel. The mechanical properties, with and without CIP processing, are estimated by means of the
small punch test, a suitable experimental technique to assess the mechanical response of small samples.
In addition,we investigate the porosity andmicrostructure of thematerial according to the orientations of
layer deposition during themanufacturing process. Our observations reveal a homogeneous distribution
independent of these orientations, evidencing thus an isotropic behaviour of the material.
Palabras clave
cold isostatic pressure
metal 3D printing
small punch test
binder jetting
Materia
Resistencia de materiales
Strength of materials
Versión del editor
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