Papers by Luigi Maria Galantucci
Lecture notes in mechanical engineering, 2020
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CRC Press eBooks, Sep 22, 2009
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Elsevier eBooks, 1989
ABSTRACT An experimental study has been carried out to investigate the technological possibility ... more ABSTRACT An experimental study has been carried out to investigate the technological possibility of obtaining metastable copper alloys with high chromium percentages. These alloys, though having potential characteristics of extreme industrial interest, cannot be achieved with conventional methods owing to copper and chromium solid immiscibility. In order to do this a 500 W - CO2 Laser source has been used and an experimental plan based on the analysis of the influence of various process parameters (coating thicknesses, Laser energy transfer, pulse or continuous, covering gases and speed rate) upon the treatments, has been set up. Experimental results allow us to affirm that copper-chromium alloys with high chromium percentages are now possible by using low power Laser sources: pulse wave seems to be the most suitable, giving the greatest alloyed thicknesses and neglegible heat treated zones in the base metal. Further investigations are in progress on the possibility of adopting higher power Laser sources and other coatings to improve the metallurgical characteristic of the alloyed zone and to find the optimal technological process.
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The International Journal of Advanced Manufacturing Technology, Feb 23, 2023
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Courses and lectures, 1996
Google, Inc. (search). ...
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The International Journal of Advanced Manufacturing Technology, Aug 1, 2017
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Progress in additive manufacturing, Jun 6, 2023
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CRC Press eBooks, Sep 22, 2009
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Measurement Science and Technology, Oct 25, 2019
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Additive manufacturing, May 1, 2018
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SCIRES-IT : SCIentific RESearch and Information Technology, Jul 11, 2018
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Metrology and Measurement Systems, Jul 26, 2023
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ESAFORM 2021, Mar 28, 2021
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Advanced technologies and materials, Jun 15, 2022
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Additive manufacturing, Jul 1, 2022
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Rapid Prototyping Journal, Aug 22, 2022
Purpose This paper aims to provide a comparison between the mechanical performance and microstruc... more Purpose This paper aims to provide a comparison between the mechanical performance and microstructural aspects of stainless steel 17-4 PH processed using, respectively, two technologies: atomic diffusion additive manufacturing (ADAM) and metal fused filament fabrication (MFFF). Design/methodology/approach Different tensile specimens have been printed using an industrial system and a consumer three-dimensional (3D) printer, varying two main 3D printing parameters. Mechanical and microstructural tests are executed to make a comparison between these two technologies and two different feedstock material, to identify the main differences. Findings These 3D printing processes make parts with different surface quality, mechanical and microstructural properties. The parts, printed by the industrial system (ADAM), showed lower values of roughness, respect those produced using the 3D consumer printer (MFFF). The different sintering process parameters and the two debinding methods (catalytic or solvent based) affect the parts properties such as porosity, microstructure, grain size and amount of δ-ferrite. These proprieties are responsible for dissimilar tensile strength and hardness values. With the aim to compare the performances among traditional metal additive technology, MFFF and ADAM, a basic analysis of times and costs has been done. Originality/value The application of two metal extrusion techniques could be an alternative to other metal additive manufacturing technologies based on laser or electron beam. The low cost and printing simplicity are the main drivers of the replacements of these technologies in not extreme application fields.
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Procedia CIRP
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Papers by Luigi Maria Galantucci