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Faculté des Sciences appliquées
Faculté des Sciences appliquées
MASTER THESIS
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Characterisation of the material interface in multi-material additive manufacturing

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Gianfolcaro, Nicolas ULiège
Promotor(s) : Mertens, Anne ULiège
Date of defense : 6-Sep-2021/7-Sep-2021 • Permalink : http://hdl.handle.net/2268.2/13268
Details
Title : Characterisation of the material interface in multi-material additive manufacturing
Author : Gianfolcaro, Nicolas ULiège
Date of defense  : 6-Sep-2021/7-Sep-2021
Advisor(s) : Mertens, Anne ULiège
Committee's member(s) : Job, Nathalie ULiège
Dedry, Olivier ULiège
Xiaoshuang, Li 
Language : English
Number of pages : 92
Discipline(s) : Engineering, computing & technology > Materials science & engineering
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en ingénieur civil en chimie et science des matériaux, à finalité spécialisée
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[en] The aim of this work is the characterisation of the interface of a bimetallic material composed of Cu-Cr-Zr, a copper alloy known for its good thermal conductivity, and maraging steel, well known for its good mechanical properties. This combination will be done thanks to laser powder bed fusion technique. The pieces are produced in a 3D printer that comes from ”Aquanity” with a printing head developed by Aerosint. The first part of the project is the determination of the printing parameters of each material alone. This determination is done thanks to porosity measurements on optical microscope and density measurements on pycnometer. The relative density obtained reaches more than 99.9% for both materials. Once the printing parameters have been determined, the interface is analysed thanks to optical and electronic microscopy. The vertical as well as the horizontal interface were analysed. Leading to satisfying results for the second one and unsatisfying results for the first one. These unsatisfying results are linked to cracks and lacks of fusion appearance as well as massive material mixing next to the vertical interface. The horizontal interface have been analysed with maraging steel above Cu-Cr-Zr and with Cu-Cr-Zr above maraging steel, showing satisfying results in both configurations.Lastly, the thermal properties of Cu-Cr-Zr as well as the mechanical properties of maraging steel were measured before and after heat treatment. The heat treatment performed is an ageing treatment with an ageing temperature of 520°C and an ageing time of one hour. This heat treatment leads to an increase of 50% in hardness of maraging steel and an increase of 200% in thermal diffusivity of Cu-Cr-Zr. Showing a clear effectiveness of the heat treatment. The thermal diffusivity of the bimetallic material was measured as well before and after heat treatment.


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Description: Master thesis - Nicolas Gianfolcaro
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Description: Summary of the master thesis - Nicolas Gianfolcaro
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Author

  • Gianfolcaro, Nicolas ULiège Université de Liège > Master ingé. civil chim. & sc. mat., à fin.

Promotor(s)

Committee's member(s)

  • Job, Nathalie ULiège Université de Liège - ULiège > Department of Chemical Engineering > Ingéniérie électrochimique
    ORBi View his publications on ORBi
  • Dedry, Olivier ULiège Université de Liège - ULiège > Département d'aérospatiale et mécanique > Metallic materials for additive manufacturing
    ORBi View his publications on ORBi
  • Xiaoshuang, Li
  • Total number of views 99
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