Porosity analysis of polyamide-12 in multi jet fusion

Shrinkage is a prevalent problem in the field of additive manufacturing, some adverse effects of shrinkage include warpage and dimensional inaccuracy in the final product. To mitigate these effects, there is a need to study the shrinkages in PA12. Crystallisation shrinkage, which is one of the...

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Main Author: Wang, Bin Hao
Other Authors: Du Hejun
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2023
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Online Access:https://hdl.handle.net/10356/167943
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1679432023-06-10T16:50:28Z Porosity analysis of polyamide-12 in multi jet fusion Wang, Bin Hao Du Hejun School of Mechanical and Aerospace Engineering MHDU@ntu.edu.sg Engineering::Mechanical engineering Shrinkage is a prevalent problem in the field of additive manufacturing, some adverse effects of shrinkage include warpage and dimensional inaccuracy in the final product. To mitigate these effects, there is a need to study the shrinkages in PA12. Crystallisation shrinkage, which is one of the main contributing factors to the total shrinkage, have been extensively reported in research articles. Thus, this project aims to determine the shrinkage induced by the pores of Polyamide-12 (PA12) in Multi-Jet Fusion (MJF). Specimens were prepared using TMA machine under different heat rates, such that the number and size of pores are made distinct. It was observed that the specimens with slower heating rate having less pores, smaller total pore area and experiencing less shrinkage induced by pores. Whilst specimens with faster heating rate having more pores, larger total pore area and also experiencing larger shrinkages induced by pores. Bachelor of Engineering (Mechanical Engineering) 2023-06-05T08:28:34Z 2023-06-05T08:28:34Z 2023 Final Year Project (FYP) Wang, B. H. (2023). Porosity analysis of polyamide-12 in multi jet fusion. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/167943 https://hdl.handle.net/10356/167943 en A202 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
Wang, Bin Hao
Porosity analysis of polyamide-12 in multi jet fusion
description Shrinkage is a prevalent problem in the field of additive manufacturing, some adverse effects of shrinkage include warpage and dimensional inaccuracy in the final product. To mitigate these effects, there is a need to study the shrinkages in PA12. Crystallisation shrinkage, which is one of the main contributing factors to the total shrinkage, have been extensively reported in research articles. Thus, this project aims to determine the shrinkage induced by the pores of Polyamide-12 (PA12) in Multi-Jet Fusion (MJF). Specimens were prepared using TMA machine under different heat rates, such that the number and size of pores are made distinct. It was observed that the specimens with slower heating rate having less pores, smaller total pore area and experiencing less shrinkage induced by pores. Whilst specimens with faster heating rate having more pores, larger total pore area and also experiencing larger shrinkages induced by pores.
author2 Du Hejun
author_facet Du Hejun
Wang, Bin Hao
format Final Year Project
author Wang, Bin Hao
author_sort Wang, Bin Hao
title Porosity analysis of polyamide-12 in multi jet fusion
title_short Porosity analysis of polyamide-12 in multi jet fusion
title_full Porosity analysis of polyamide-12 in multi jet fusion
title_fullStr Porosity analysis of polyamide-12 in multi jet fusion
title_full_unstemmed Porosity analysis of polyamide-12 in multi jet fusion
title_sort porosity analysis of polyamide-12 in multi jet fusion
publisher Nanyang Technological University
publishDate 2023
url https://hdl.handle.net/10356/167943
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