A comprehensive study on variability of relative density in selective laser melting of Ti-6Al-4V
In this research, the effects of Selective Laser Melting (SLM) process parameters comprising laser power, scan speed, hatch space and scan pattern angle on the formation of porosity and subsequently density have been analysed. To improve the mechanical properties, post-processes (heat treatment) mus...
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Format: | Article |
Language: | English |
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Taylor & Francis Group
2019-10-01
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Series: | Virtual and Physical Prototyping |
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Online Access: | http://dx.doi.org/10.1080/17452759.2019.1614198 |
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author | Amir Mahyar Khorasani Ian Gibson AmirHossein Ghasemi Alireza Ghaderi |
author_facet | Amir Mahyar Khorasani Ian Gibson AmirHossein Ghasemi Alireza Ghaderi |
author_sort | Amir Mahyar Khorasani |
collection | DOAJ |
description | In this research, the effects of Selective Laser Melting (SLM) process parameters comprising laser power, scan speed, hatch space and scan pattern angle on the formation of porosity and subsequently density have been analysed. To improve the mechanical properties, post-processes (heat treatment) must be performed. Therefore, heat treatment was added to the design of experiment to analyse the effect of this process coupling with SLM process parameters on the value of density. A comprehensive design set with five levels for each parameter was selected so Taguchi L25 was used as the design of experiment. The significance of each parameter on obtained results was examined using statistical analysis (F-Test) and numerical model (interrogator analysis). The correlation between two process parameters was discussed by using 3D analytical and contour plots and the mechanisms behind these were discussed in depth. The contribution of this paper is a deep investigation of the relation of process parameters and heat treatment on density based on the Artificial Neural Network model. Results showed that better density is obtained with lower scan speed, laser power and scanning pattern angle. Meanwhile, for heat treatment and hatch space, the best density was obtained in their optimum range. |
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institution | Directory Open Access Journal |
issn | 1745-2759 1745-2767 |
language | English |
last_indexed | 2024-03-11T23:03:16Z |
publishDate | 2019-10-01 |
publisher | Taylor & Francis Group |
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series | Virtual and Physical Prototyping |
spelling | doaj.art-16b26d5b81434b74a145a958d52302172023-09-21T14:38:01ZengTaylor & Francis GroupVirtual and Physical Prototyping1745-27591745-27672019-10-0114434935910.1080/17452759.2019.16141981614198A comprehensive study on variability of relative density in selective laser melting of Ti-6Al-4VAmir Mahyar Khorasani0Ian Gibson1AmirHossein Ghasemi2Alireza Ghaderi3School of Engineering, Deakin UniversitySchool of Engineering, Deakin UniversityFaculty of Engineering, University of KashanInstitute for Frontier Materials, Deakin UniversityIn this research, the effects of Selective Laser Melting (SLM) process parameters comprising laser power, scan speed, hatch space and scan pattern angle on the formation of porosity and subsequently density have been analysed. To improve the mechanical properties, post-processes (heat treatment) must be performed. Therefore, heat treatment was added to the design of experiment to analyse the effect of this process coupling with SLM process parameters on the value of density. A comprehensive design set with five levels for each parameter was selected so Taguchi L25 was used as the design of experiment. The significance of each parameter on obtained results was examined using statistical analysis (F-Test) and numerical model (interrogator analysis). The correlation between two process parameters was discussed by using 3D analytical and contour plots and the mechanisms behind these were discussed in depth. The contribution of this paper is a deep investigation of the relation of process parameters and heat treatment on density based on the Artificial Neural Network model. Results showed that better density is obtained with lower scan speed, laser power and scanning pattern angle. Meanwhile, for heat treatment and hatch space, the best density was obtained in their optimum range.http://dx.doi.org/10.1080/17452759.2019.1614198additive manufacturingdensitymechanical propertiesmodelingprocess parameters |
spellingShingle | Amir Mahyar Khorasani Ian Gibson AmirHossein Ghasemi Alireza Ghaderi A comprehensive study on variability of relative density in selective laser melting of Ti-6Al-4V Virtual and Physical Prototyping additive manufacturing density mechanical properties modeling process parameters |
title | A comprehensive study on variability of relative density in selective laser melting of Ti-6Al-4V |
title_full | A comprehensive study on variability of relative density in selective laser melting of Ti-6Al-4V |
title_fullStr | A comprehensive study on variability of relative density in selective laser melting of Ti-6Al-4V |
title_full_unstemmed | A comprehensive study on variability of relative density in selective laser melting of Ti-6Al-4V |
title_short | A comprehensive study on variability of relative density in selective laser melting of Ti-6Al-4V |
title_sort | comprehensive study on variability of relative density in selective laser melting of ti 6al 4v |
topic | additive manufacturing density mechanical properties modeling process parameters |
url | http://dx.doi.org/10.1080/17452759.2019.1614198 |
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