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Dissertation
Optimization and Characterization of Metallic Multi-Materials by Laser Powder Bed Fusion
Authors: --- --- --- ---
Year: 2022 Publisher: Liège Université de Liège (ULiège)

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Abstract

Additive manufacturing, or 3D printing, has largely developed in the last 5-10 years and a lot of companies were created by coming up with ingenious and new processes, Aerosint is one of them. Aerosint has developed the first Laser Powder Bed Fusion printing head that allows to print two materials at the same time.
In this work, some thermal properties of pure and bi-material parts are studied. The pure metallic parts are made out of CuCrZr and Maraging steel M300 and the bi-metallic parts are made out of a both. The evolution of the thermal diffusivity is studied for the as built printed parts and for two aging treatments, one at 520°C during 45 min and one at 520°C during 6h. Then the augmentation in diffusivity induced by the addition of copper on the steel is studied. After that a measurement of the evolution of the contact resistance between the two metals is led. Finally, a short study of the evolution of the grain size in the copper alloy is done thanks to the ASTM E112 standard.
The results show that for the CuCrZr the diffusivity is 3 times higher after 45 min of aging and stays stable after (from 30 to around 90 mm^2/s). For the M300 the diffusivity is multiplied by 1.1 for a heat treatment of 45 min and by 1.3 for a heat treatment of 6 hours (from 4.5 to 5.5 mm^2/s to 6.5 mm^2/s), so for the steel alloy the aging does not do much, at least in terms of diffusivity. The bi-material part has around 1.8 times better diffusivity than the steel alone for the as-built part and for the heat treated parts it is around 2.3 times better.
The contact resistance drops down to around 10% of its as built value after 45 min of heat treatment and then goes up again to around 15 of its as built value after 6h of heat treatment (from 1.5 x 10^(−5) to 1.7 x 10^(−6) m^2K/W).
The use of ASTM E112 says that the grain size does not change during the heat treatments and stays at around 6.


Book
Surface Treatment by Laser-Assisted Techniques
Author:
Year: 2020 Publisher: Basel, Switzerland : MDPI - Multidisciplinary Digital Publishing Institute,

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The book “Surface Treatment by Laser-Assisted Techniques” presents state-of-the-art research applications of lasers for surface modification. Applications in a broad spectrum of fields are presented: the aircraft and automotive sector, the manufacturing industry, sensor development, electronics, biomedical engineering, or the energy sector. Several radiation sources are included, from pulsed lasers in the visible and near-infrared regions to continuous-wave mid-infrared laser sources. The different chapters of the book “Surface Treatment by Laser-Assisted Techniques” cover laser texturing at nanoscale and microscale for modification of hydrophobicity, hydrophilicity, and ice nucleation; the production of palladium, platinum and silver nanoparticles for sensor applications; the texturization of composite bioceramics for improved fixation in bone prosthesis; the surface texturization of natural ceramic materials by scanned laser radiation; the laser ablation of interfaces to enhance adhesion in dissimilar joints; the analysis of material thermoelastic response; and the production of highly polished topographies in pulsed laser surface modification. Moreover, the production of high-entropy alloy/diamond composite coatings, the modellization of the gas-powder injection, and the generation of thermal barrier coatings by laser cladding are reported in the last chapters of this book.

Keywords

Engineering --- Technology --- Pd --- Pt --- FTO --- laser irradiations --- dewetting --- nanoparticles --- surface treatment --- CO2 laser --- scanning system --- granite stone --- dual-beam --- beam shaper --- MPFV method --- laser polishing --- zigzag-square wave --- bioceramics --- laser ablation --- roughness --- composites --- hip joint prosthesis --- cementless cup --- bone --- silver nanoparticles --- electrophoretic deposition --- pulsed laser ablation in liquid --- laser welding --- metal-polymer --- thermal contact resistance --- generalized thermoelasticity --- laser radiation --- volumetric absorption --- thermal stresses --- cooling effect --- laser cladding --- diamond composite coating --- high entropy alloy --- high scanning speed --- wear resistance --- laser-cladding --- La2Zr2O7 thermal barrier coating --- Ni-based superalloy --- high temperature oxidation --- thermal shock --- extreme high-speed laser material deposition (EHLA) --- laser material deposition (LMD) --- coaxial powder nozzle --- coating --- additive manufacturing --- numerical simulation --- hydrothermal treatment --- micro/nano-hierarchical structures --- wetting model --- anti-icing --- History. --- History. --- Pd --- Pt --- FTO --- laser irradiations --- dewetting --- nanoparticles --- surface treatment --- CO2 laser --- scanning system --- granite stone --- dual-beam --- beam shaper --- MPFV method --- laser polishing --- zigzag-square wave --- bioceramics --- laser ablation --- roughness --- composites --- hip joint prosthesis --- cementless cup --- bone --- silver nanoparticles --- electrophoretic deposition --- pulsed laser ablation in liquid --- laser welding --- metal-polymer --- thermal contact resistance --- generalized thermoelasticity --- laser radiation --- volumetric absorption --- thermal stresses --- cooling effect --- laser cladding --- diamond composite coating --- high entropy alloy --- high scanning speed --- wear resistance --- laser-cladding --- La2Zr2O7 thermal barrier coating --- Ni-based superalloy --- high temperature oxidation --- thermal shock --- extreme high-speed laser material deposition (EHLA) --- laser material deposition (LMD) --- coaxial powder nozzle --- coating --- additive manufacturing --- numerical simulation --- hydrothermal treatment --- micro/nano-hierarchical structures --- wetting model --- anti-icing


Book
Surface Treatment by Laser-Assisted Techniques
Author:
Year: 2020 Publisher: Basel, Switzerland : MDPI - Multidisciplinary Digital Publishing Institute,

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Abstract

The book “Surface Treatment by Laser-Assisted Techniques” presents state-of-the-art research applications of lasers for surface modification. Applications in a broad spectrum of fields are presented: the aircraft and automotive sector, the manufacturing industry, sensor development, electronics, biomedical engineering, or the energy sector. Several radiation sources are included, from pulsed lasers in the visible and near-infrared regions to continuous-wave mid-infrared laser sources. The different chapters of the book “Surface Treatment by Laser-Assisted Techniques” cover laser texturing at nanoscale and microscale for modification of hydrophobicity, hydrophilicity, and ice nucleation; the production of palladium, platinum and silver nanoparticles for sensor applications; the texturization of composite bioceramics for improved fixation in bone prosthesis; the surface texturization of natural ceramic materials by scanned laser radiation; the laser ablation of interfaces to enhance adhesion in dissimilar joints; the analysis of material thermoelastic response; and the production of highly polished topographies in pulsed laser surface modification. Moreover, the production of high-entropy alloy/diamond composite coatings, the modellization of the gas-powder injection, and the generation of thermal barrier coatings by laser cladding are reported in the last chapters of this book.


Book
Surface Treatment by Laser-Assisted Techniques
Author:
Year: 2020 Publisher: Basel, Switzerland : MDPI - Multidisciplinary Digital Publishing Institute,

Loading...
Export citation

Choose an application

Bookmark

Abstract

The book “Surface Treatment by Laser-Assisted Techniques” presents state-of-the-art research applications of lasers for surface modification. Applications in a broad spectrum of fields are presented: the aircraft and automotive sector, the manufacturing industry, sensor development, electronics, biomedical engineering, or the energy sector. Several radiation sources are included, from pulsed lasers in the visible and near-infrared regions to continuous-wave mid-infrared laser sources. The different chapters of the book “Surface Treatment by Laser-Assisted Techniques” cover laser texturing at nanoscale and microscale for modification of hydrophobicity, hydrophilicity, and ice nucleation; the production of palladium, platinum and silver nanoparticles for sensor applications; the texturization of composite bioceramics for improved fixation in bone prosthesis; the surface texturization of natural ceramic materials by scanned laser radiation; the laser ablation of interfaces to enhance adhesion in dissimilar joints; the analysis of material thermoelastic response; and the production of highly polished topographies in pulsed laser surface modification. Moreover, the production of high-entropy alloy/diamond composite coatings, the modellization of the gas-powder injection, and the generation of thermal barrier coatings by laser cladding are reported in the last chapters of this book.

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