Effects of build positions on the thermal history, crystallization, and mechanical properties of polyamide 12 parts printed by Multi Jet Fusion
Multi Jet Fusion (MJF) has gradually been utilised for the commercial fabrication of final products. In particular, the mechanical properties of MJF-printed polyamide 12 (MJF PA12) parts have been widely investigated by manipulating the process parameters such as the printing orientation and the coo...
| Main Authors: | , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/161115 |
| _version_ | 1811688271982362624 |
|---|---|
| author | Chen, Kaijuan Koh, Zhi Hui Le, Kim Quy Teo, Benjamin How Wei Zheng, Han Zeng, Jun Zhou, Kun Du, Hejun |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Chen, Kaijuan Koh, Zhi Hui Le, Kim Quy Teo, Benjamin How Wei Zheng, Han Zeng, Jun Zhou, Kun Du, Hejun |
| author_sort | Chen, Kaijuan |
| collection | NTU |
| description | Multi Jet Fusion (MJF) has gradually been utilised for the commercial fabrication of final products. In particular, the mechanical properties of MJF-printed polyamide 12 (MJF PA12) parts have been widely investigated by manipulating the process parameters such as the printing orientation and the cooling rate. In this work, the effects of build positions on the thermal history, crystallization, and mechanical properties of MJF PA12 parts were investigated. The thermal history of printed parts was obtained using the MJF Thermal Prediction Engine software developed by Hewlett-Packard HP Labs (HP Inc.). As compared to the parts printed at the boundaries, those in the centre region experienced a slower cooling rate, which was favourable for crystal growth. Both the crystallite size and crystallinity of the parts in the centre region were larger than those of the parts at the boundaries. The parts printed in the centre region had slightly higher tensile modulus and significantly smaller elongation at break and strain energy density than those printed at the boundaries. The tensile strength of the parts at different locations was comparable. This work serves as a guide to selecting the build position of MJF-printed parts to achieve desirable mechanical properties. |
| first_indexed | 2024-10-01T05:29:34Z |
| format | Journal Article |
| id | ntu-10356/161115 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:29:34Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1611152022-08-20T20:11:35Z Effects of build positions on the thermal history, crystallization, and mechanical properties of polyamide 12 parts printed by Multi Jet Fusion Chen, Kaijuan Koh, Zhi Hui Le, Kim Quy Teo, Benjamin How Wei Zheng, Han Zeng, Jun Zhou, Kun Du, Hejun School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Nanyang Environment and Water Research Institute HP-NTU Digital Manufacturing Corporate Lab Environmental Process Modelling Centre Engineering::Mechanical engineering Multi Jet Fusion Polyamide 12 Multi Jet Fusion (MJF) has gradually been utilised for the commercial fabrication of final products. In particular, the mechanical properties of MJF-printed polyamide 12 (MJF PA12) parts have been widely investigated by manipulating the process parameters such as the printing orientation and the cooling rate. In this work, the effects of build positions on the thermal history, crystallization, and mechanical properties of MJF PA12 parts were investigated. The thermal history of printed parts was obtained using the MJF Thermal Prediction Engine software developed by Hewlett-Packard HP Labs (HP Inc.). As compared to the parts printed at the boundaries, those in the centre region experienced a slower cooling rate, which was favourable for crystal growth. Both the crystallite size and crystallinity of the parts in the centre region were larger than those of the parts at the boundaries. The parts printed in the centre region had slightly higher tensile modulus and significantly smaller elongation at break and strain energy density than those printed at the boundaries. The tensile strength of the parts at different locations was comparable. This work serves as a guide to selecting the build position of MJF-printed parts to achieve desirable mechanical properties. Published version This work was supported by Industry Alignment Fund-Industry Collaboration Projects Grant: [Grant Number I1801E0028]. 2022-08-16T05:08:21Z 2022-08-16T05:08:21Z 2022 Journal Article Chen, K., Koh, Z. H., Le, K. Q., Teo, B. H. W., Zheng, H., Zeng, J., Zhou, K. & Du, H. (2022). Effects of build positions on the thermal history, crystallization, and mechanical properties of polyamide 12 parts printed by Multi Jet Fusion. Virtual and Physical Prototyping, 17(3), 631-648. https://dx.doi.org/10.1080/17452759.2022.2046478 1745-2759 https://hdl.handle.net/10356/161115 10.1080/17452759.2022.2046478 2-s2.0-85126225207 3 17 631 648 en I1801E0028 Virtual and Physical Prototyping © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way. application/pdf |
| spellingShingle | Engineering::Mechanical engineering Multi Jet Fusion Polyamide 12 Chen, Kaijuan Koh, Zhi Hui Le, Kim Quy Teo, Benjamin How Wei Zheng, Han Zeng, Jun Zhou, Kun Du, Hejun Effects of build positions on the thermal history, crystallization, and mechanical properties of polyamide 12 parts printed by Multi Jet Fusion |
| title | Effects of build positions on the thermal history, crystallization, and mechanical properties of polyamide 12 parts printed by Multi Jet Fusion |
| title_full | Effects of build positions on the thermal history, crystallization, and mechanical properties of polyamide 12 parts printed by Multi Jet Fusion |
| title_fullStr | Effects of build positions on the thermal history, crystallization, and mechanical properties of polyamide 12 parts printed by Multi Jet Fusion |
| title_full_unstemmed | Effects of build positions on the thermal history, crystallization, and mechanical properties of polyamide 12 parts printed by Multi Jet Fusion |
| title_short | Effects of build positions on the thermal history, crystallization, and mechanical properties of polyamide 12 parts printed by Multi Jet Fusion |
| title_sort | effects of build positions on the thermal history crystallization and mechanical properties of polyamide 12 parts printed by multi jet fusion |
| topic | Engineering::Mechanical engineering Multi Jet Fusion Polyamide 12 |
| url | https://hdl.handle.net/10356/161115 |
| work_keys_str_mv | AT chenkaijuan effectsofbuildpositionsonthethermalhistorycrystallizationandmechanicalpropertiesofpolyamide12partsprintedbymultijetfusion AT kohzhihui effectsofbuildpositionsonthethermalhistorycrystallizationandmechanicalpropertiesofpolyamide12partsprintedbymultijetfusion AT lekimquy effectsofbuildpositionsonthethermalhistorycrystallizationandmechanicalpropertiesofpolyamide12partsprintedbymultijetfusion AT teobenjaminhowwei effectsofbuildpositionsonthethermalhistorycrystallizationandmechanicalpropertiesofpolyamide12partsprintedbymultijetfusion AT zhenghan effectsofbuildpositionsonthethermalhistorycrystallizationandmechanicalpropertiesofpolyamide12partsprintedbymultijetfusion AT zengjun effectsofbuildpositionsonthethermalhistorycrystallizationandmechanicalpropertiesofpolyamide12partsprintedbymultijetfusion AT zhoukun effectsofbuildpositionsonthethermalhistorycrystallizationandmechanicalpropertiesofpolyamide12partsprintedbymultijetfusion AT duhejun effectsofbuildpositionsonthethermalhistorycrystallizationandmechanicalpropertiesofpolyamide12partsprintedbymultijetfusion |