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Grant
Agency: Cordis | Branch: FP7 | Program: CSA-SA | Phase: NMP.2012.4.0-2 | Award Amount: 682.65K | Year: 2012

SASAMs mission is to drive the growth of AM to efficient and sustainable industrial processes by integrating and coordinating Standardisation activities for Europe by creating and supporting a Standardisation organisation in the field of AM. The Additive Manufacturing (AM) concept is based on additive freeform fabrication technologies for the automated production of complex products. Additive Manufacturing is defined as the direct production of finished goods using additive processes from digital data. A key advantage is that AM eliminates the need for tooling, such as moulds and dies, that can make the introduction of new products prohibitively expensive, both in time and money. This enables the production of forms that have been long considered impossible by conventional series productionin fact, they can be created fast, flexibly, and with fewer machines.


Patent
École Centrale Lyon, French National Center for Scientific Research, University of Lyon and National School of Engineering, Saint-Etienne | Date: 2011-11-08

The present invention relates to a device for characterizing mechanical properties of a material (S) with a low modulus of elasticity, comprising an application surface (3) and a mechanical stressing mechanism (5), said mechanical stressing mechanism comprising: a mobile indenter (6) that can move at least in vertical translation so as to bear substantially normally on said material and on said application surface (3), at least one means (14) for translating said indenter along a vertical axis Z-Z from a reference position in which the indenter is not in contact with the material (S) and at least one sensor (11) for measuring the load applied by the indenter on the material (S) along a direction normal to the application surface on the material, and at least one position sensor (20) able to determine the vertical position of said indenter (6) with respect to said reference position.


Grant
Agency: Cordis | Branch: H2020 | Program: IA | Phase: SILC-II-2014 | Award Amount: 8.44M | Year: 2015

The AGRAL (Advanced Green Aluminium anode) project will aim at developing the manufacturing technologies of a specific cermet (called AGRAL cermet within this proposal) that has shown at lab scale outstanding properties in high temperature and corrosive media i.e. aluminium electrolysis. Furthermore, this AGRAL cermet enables Aluminium Pechiney, leader of this project, to consider the replacement of their current carbon anode by this inert anode thus decreasing to zero the CO2 emission during electrolysis process. Furthermore this AGRAL cermet will be tested for two applications: aluminium electrolysis (for the manufacturing of an inert anode up to industrial scale) and for protection of interconnect plates in hydrogen and fuel cell application (up to pre-prototype scale). This AGRAL cermet will be used as an inert anode in the Aluminium industry. Thanks to the inert anode, it is expected to decrease by a minimum of 50% of CO2 emissions compared to currently used carbon anode. Then, the transfer to the fuel and hydrogen cell applications will be studied. To reach the objectives, the partners will aim at: - Developing the manufacturing process for the AGRAL cermet coating for aluminium electrolysis o The Thermal Spray coatings: HVOF (combined eventually with Cold Spray ) and eGun (HVOF with ethanol, technology developed by Flame Spray Technologies) o The Powder Metallurgy Process : HIP and Ultraflex (technology developed by Kennametal Stellite) The final manufacturing process will be adapted to large dimension (an anode is 1m long) and to complex shape (plates, grid). - Developing qualification test for real scale inert anode to detect failure of the anode operation - Developing the manufacturing process for the AGRAL cermet coating for hydrogen and fuel cell interconnect plates The economic viability and the environmental impact of both the inert anode and its manufacturing process and the fuel cell application along their whole life cycle, will be monitored.


Chivel Yu.,RAS Research Center Kurchatov Institute | Smurov I.,National School of Engineering, Saint-Etienne
Physics Procedia | Year: 2011

The principles of measuring the surface temperature of powder bed in the focal spot of the laser radiation while scanning the surface using galvoscanner with F-teta lens have been designed. The optical system provide the possibility to measure spatial distribution of brightness temperature at two wavelengths and selected temperature profiles, calculation of colour temperature and maximum temperature in focal spot. Investigation of the sintering of overhang layers has been conducted under temperature monitoring and Rayleigh - Taylor instability of the contact surface between melt and loose powder in a gravity field was found. © 2011 Published by Elsevier Ltd.


Chivel Yu.,RAS Research Center Kurchatov Institute | Smurov I.,National School of Engineering, Saint-Etienne
Physics Procedia | Year: 2010

Poor efficiency of selective laser sintering/ melting (SLS/SLM) processes and poor articles surface quality are mainly responsible for their slow manufacturing application. That is why optical monitoring has paramount importance for SLS/SLM process resulting part quality. The optical systems for temperature monitoring of SLS/SLM process are developed and integrated with industrial SLS/SLM machines. The system provides the possibility to spatial distribution of brightness temperature at two wavelengths and selected temperature profiles, calculation of colour temperature and express analysis of possible deviations of the maximum temperature from its optimal value. Optimal regimes of SLS process for the sintering of the high porosity powder body was determined. © 2010 Published by Elsevier B.V.


Krakhmalev P.,Karlstad University | Yadroitsev I.,National School of Engineering, Saint-Etienne
Intermetallics | Year: 2014

Transition metal silicides and carbides are attractive advanced materials possessing unique combinations of physical and mechanical properties. However, conventional synthesis of bulk intermetallics is a challenging task because of their high melting point. In the present research, titanium carbides and silicides composites were fabricated on the titanium substrate by a selective laser melting (SLM) of Ti-(20,30,40 wt.%)SiC powder mixtures by an Ytterbium fiber laser with 1.075 μm wavelength, operating at 50 W power, with the laser scanning speed of 120 mm/s. Phase analysis of the fabricated coatings showed that the initial powders remelted and new multiphase structures containing TiCx, Ti5Si3Cx, TiSi2 and SiC phases in situ formed. Investigation of the microstructure revealed two main types of inhomogeneities in the composites, (i) SiC particles at the interlayer interfaces and, (ii) chemical segregation of the elements in the central areas of the tracks. It was suggested and experimentally proven that an increase in laser power to 80 W was an efficient way to improve the laser penetration depth and the mass transport in the liquid phase, and therefore, to fabricate more homogeneous composite. The SLM Ti-(20,30,40 wt.%)SiC composites demonstrated high hardness (11-17 GPa) and high abrasive wear resistance (3.99 × 10-7-9.51 × 10-7g/Nm) properties, promising for the applications involving abrasive wear. © 2013 Elsevier Ltd. All rights reserved.


Yadroitsev I.,National School of Engineering, Saint-Etienne | Krakhmalev P.,Karlstad University | Yadroitsava I.,National School of Engineering, Saint-Etienne
Journal of Alloys and Compounds | Year: 2014

Selective laser melting (SLM) is a kind of additive manufacturing where parts are made directly from 3D CAD data layer-by-layer from powder material. SLM products are used in various industries including aerospace, automotive, electronic, chemical, biomedical and other high-tech areas. The properties of the parts produced by SLM depend strongly on the material nature, characteristics of each single track and each single layer, as well as the strength of the connections between them. Studying the temperature distribution during SLM is important because temperature gradient and heat transfer determine the microstructure and finally mechanical properties of the SLM part. In this study a CCD camera was applied for determination of the surface temperature distribution and the molten pool size of Ti6Al4V alloy. The investigation of the microstructure evolution after different heat treatments was carried out to determine the microstructure in terms of applicability for the biomedical industry. © 2013 Elsevier B.V. All rights reserved.


Yadroitsev I.,National School of Engineering, Saint-Etienne | Smurov I.,National School of Engineering, Saint-Etienne
Physics Procedia | Year: 2010

To up-grade SLM process for manufacturing real components, high mechanical properties of final product must be achieved. The properties of a part produced by SLM technology depend strongly on the properties of each single track and each single layer. In this study, effects of the processing parameters such as laser power, scanning speed and powder layer thickness on the single tracks formation are analyzed. It is shown that, by choosing an optimal technological window and appropriate strategy of SLM, it is possible to manufacture highly complex parts with mechanical properties comparable to those of wrought material. © 2010 Published by Elsevier B.V.


Gusarov A.V.,National School of Engineering, Saint-Etienne | Smurov I.,National School of Engineering, Saint-Etienne
Physics Procedia | Year: 2010

Obtaining uniform single vectors well attached to the substrate is necessary and sufficient for fabrication of complex-shape parts of high quality by selective laser melting. The temperature distribution in the laser/powder interaction zone and the shape of the melt pool is numerically calculated by the proposed model of coupled radiation and heat transfer applicable to single vectors. The analysis of the capillary stability of the segmental cylinder applied to the calculated melt pool estimates the stability of the process depending on the scanning velocity, powder layer thickness, and the material optical and thermal properties. © 2010 Published by Elsevier B.V.


Yadroitsev I.,National School of Engineering, Saint-Etienne | Smurov I.,National School of Engineering, Saint-Etienne
Physics Procedia | Year: 2011

Selective Laser Melting (SLM) is a powder-based additive manufacturing capable to produce parts layer-by-layer from a 3D CAD model. Currently there is a growing interest in industry for applying this technology for generating objects with high geometrical complexity. To introduce SLM process into industry for manufacturing real components, high mechanical properties of final product must be achieved. Properties of the manufactured parts depend strongly on each single laser-melted track and each single layer, as well as the strength of the connections between them. In this study, effects of the processing parameters such as hatch distance on surface morphology are analyzed. © 2011 Published by Elsevier Ltd.

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