Rapid characterization of graded alloys fabricated by 3D printing

3D printing has revolutionized the fabrication of metals and alloys in both academic and industrial areas, due to its advantages of one-step manufacturing into complex shapes without the need for post thermomechanical processing. However, fabrication defects, e.g., porosity, cracking, and dela...

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Main Author: Bella Lee Hoondal
Other Authors: Upadrasta Ramamurty
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2023
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Online Access:https://hdl.handle.net/10356/172891
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1728912023-12-30T16:51:30Z Rapid characterization of graded alloys fabricated by 3D printing Bella Lee Hoondal Upadrasta Ramamurty School of Mechanical and Aerospace Engineering A*STAR Institute of Material Research and Engineering uram@ntu.edu.sg Engineering::Mechanical engineering 3D printing has revolutionized the fabrication of metals and alloys in both academic and industrial areas, due to its advantages of one-step manufacturing into complex shapes without the need for post thermomechanical processing. However, fabrication defects, e.g., porosity, cracking, and delamination, severely limit the materials library for 3D printing. Therefore, it is of great significance to address the fabrication issues and/or conduct high-throughput composition screening to develop alloys that are amenable to the 3D printing process. One class of materials of particular interest is Cu-based alloys, renowned for their excellent combination of electrical conductivity and mechanical properties. However, Cu is highly reflective to the laser commonly used in 3D printing, which makes it challenging to be fully melted and then fabricated without evident defects. One of the promising approaches is to incorporate sufficient amount of alloying element to enhance the laser absorptivity. Nevertheless, the electrical conductivity of Cu alloys is sensitive to the content of alloying element and thus leads to a dilemma between printability and property. To address this issue, it is important to screen out the critical content of alloy element that allows for reliable printing without compromising the electrical properties. In this endeavour, 3D printing allows for the printing of multiple Cu-based alloy samples. These samples are subjected to meticulous characterization and porosity studies, marking a critical phase in the journey to identify optimal parameters and compositions. Researchers aim to maintain the good mechanical and electrical properties of Cu while minimizing porosity, a fundamental goal in 3D printing. This iterative process of printing, characterizing, and refining materials paves the way for the development of Cu-based alloys with superior properties. In conclusion, 3D printing's capabilities empower scientists to tackle the challenges posed by materials like Cu. Achieving good density and low porosity in these alloys is the ultimate objective, and characterization plays an indispensable role in this pursuit. This research not only contributes to our understanding of 3D printing materials but also opens doors to innovative applications of Cu and its alloys in various industries, from electronics to manufacturing. Bachelor of Engineering (Mechanical Engineering) 2023-12-28T11:08:21Z 2023-12-28T11:08:21Z 2023 Final Year Project (FYP) Bella Lee Hoondal (2023). Rapid characterization of graded alloys fabricated by 3D printing. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/172891 https://hdl.handle.net/10356/172891 en B385 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
spellingShingle Engineering::Mechanical engineering
Bella Lee Hoondal
Rapid characterization of graded alloys fabricated by 3D printing
description 3D printing has revolutionized the fabrication of metals and alloys in both academic and industrial areas, due to its advantages of one-step manufacturing into complex shapes without the need for post thermomechanical processing. However, fabrication defects, e.g., porosity, cracking, and delamination, severely limit the materials library for 3D printing. Therefore, it is of great significance to address the fabrication issues and/or conduct high-throughput composition screening to develop alloys that are amenable to the 3D printing process. One class of materials of particular interest is Cu-based alloys, renowned for their excellent combination of electrical conductivity and mechanical properties. However, Cu is highly reflective to the laser commonly used in 3D printing, which makes it challenging to be fully melted and then fabricated without evident defects. One of the promising approaches is to incorporate sufficient amount of alloying element to enhance the laser absorptivity. Nevertheless, the electrical conductivity of Cu alloys is sensitive to the content of alloying element and thus leads to a dilemma between printability and property. To address this issue, it is important to screen out the critical content of alloy element that allows for reliable printing without compromising the electrical properties. In this endeavour, 3D printing allows for the printing of multiple Cu-based alloy samples. These samples are subjected to meticulous characterization and porosity studies, marking a critical phase in the journey to identify optimal parameters and compositions. Researchers aim to maintain the good mechanical and electrical properties of Cu while minimizing porosity, a fundamental goal in 3D printing. This iterative process of printing, characterizing, and refining materials paves the way for the development of Cu-based alloys with superior properties. In conclusion, 3D printing's capabilities empower scientists to tackle the challenges posed by materials like Cu. Achieving good density and low porosity in these alloys is the ultimate objective, and characterization plays an indispensable role in this pursuit. This research not only contributes to our understanding of 3D printing materials but also opens doors to innovative applications of Cu and its alloys in various industries, from electronics to manufacturing.
author2 Upadrasta Ramamurty
author_facet Upadrasta Ramamurty
Bella Lee Hoondal
format Final Year Project
author Bella Lee Hoondal
author_sort Bella Lee Hoondal
title Rapid characterization of graded alloys fabricated by 3D printing
title_short Rapid characterization of graded alloys fabricated by 3D printing
title_full Rapid characterization of graded alloys fabricated by 3D printing
title_fullStr Rapid characterization of graded alloys fabricated by 3D printing
title_full_unstemmed Rapid characterization of graded alloys fabricated by 3D printing
title_sort rapid characterization of graded alloys fabricated by 3d printing
publisher Nanyang Technological University
publishDate 2023
url https://hdl.handle.net/10356/172891
_version_ 1787153693981802496