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Corrosion characterisation of solid and lattice AlSi10Mg manufactured by laser powder bed fusion
Dissertation (MEng (Metallurgical Engineering))--University of Pretoria, 2021.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2021
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| _version_ | 1867613519379169280 |
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| access_status_str | Open Access |
| author2 | Möller, Heinrich |
| author_browse | Möller, Heinrich |
| author_facet | Möller, Heinrich |
| collection | Thesis |
| dc_rights_str_mv | © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng (Metallurgical Engineering))--University of Pretoria, 2021. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/81138 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:26.341Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/81138 Corrosion characterisation of solid and lattice AlSi10Mg manufactured by laser powder bed fusion Möller, Heinrich Du Plessis, Anton u11200597@tuks.co.za Taute, Carlien Laser powder bed fusion Porosity Corrosion AlSi10Mg X-ray tomography UCTD Engineering, built environment and information technology theses SDG-04 SDG-04: Quality education Engineering, built environment and information technology theses SDG-08 SDG-08: Decent work and economic growth Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action Engineering, built environment and information technology theses SDG-14 SDG-14: Life below water Dissertation (MEng (Metallurgical Engineering))--University of Pretoria, 2021. Additive manufacturing can be used to produce complex, custom geometries, consolidating different parts into one. This reduces the required number of assemblies and allows distributed manufacturing with short lead times. Defects, such as porosity and surface roughness, associated with parts manufactured by laser powder bed fusion, can severely limit industrial application. The effect these defects have on corrosion and hence long term structural integrity must also be taken into consideration. This project aimed to characterise porosity in both solid and lattice cube samples produced by laser powder bed fusion, with the differences in porosity induced by changes in the process parameters, and subsequently, characterising the effect porosity has on corrosion. The alloy used in this investigation is AlSi10Mg, which is widely used in the aerospace and automotive industries. Samples were studied before and after corrosion using X-Ray computed tomography (CT scanning), metallographic examination and scanning electron microscopy (SEM), as well as compression testing for the lattice cubes. It was found that higher laser power leads to more porosity and lower surface roughness. CT scanning was a very effective method to study corrosion using aligned CT images of before-after states. Porosity did not have an effect on the corrosion during the early corrosion stages (168 hours). The manufacturing process parameters induced differences in porosity and surface conditions, but did not strongly affect corrosion. It is probable that crack initiation sites such as internal porosity and defects are filled with corrosion product, delaying the onset of cracking and failure, and the corrosion product that fill the voids adding to the full strength of the lattice will also slightly increase the compressive strength of the samples. mi2025 Materials Science and Metallurgical Engineering MEng (Metallurgical Engineering) Unrestricted SDG-04: Quality education SDG-08: Decent work and economic growth SDG-09: Industry, innovation and infrastructure SDG-12: Responsible consumption and production SDG-13: Climate action SDG-14: Life below water 2021-08-04T11:23:14Z 2021-08-04T11:23:14Z 2021-09 2021 Dissertation * S2021 http://hdl.handle.net/2263/81138 en © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Laser powder bed fusion Porosity Corrosion AlSi10Mg X-ray tomography UCTD Engineering, built environment and information technology theses SDG-04 SDG-04: Quality education Engineering, built environment and information technology theses SDG-08 SDG-08: Decent work and economic growth Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action Engineering, built environment and information technology theses SDG-14 SDG-14: Life below water Corrosion characterisation of solid and lattice AlSi10Mg manufactured by laser powder bed fusion |
| title | Corrosion characterisation of solid and lattice AlSi10Mg manufactured by laser powder bed fusion |
| title_full | Corrosion characterisation of solid and lattice AlSi10Mg manufactured by laser powder bed fusion |
| title_fullStr | Corrosion characterisation of solid and lattice AlSi10Mg manufactured by laser powder bed fusion |
| title_full_unstemmed | Corrosion characterisation of solid and lattice AlSi10Mg manufactured by laser powder bed fusion |
| title_short | Corrosion characterisation of solid and lattice AlSi10Mg manufactured by laser powder bed fusion |
| title_sort | corrosion characterisation of solid and lattice alsi10mg manufactured by laser powder bed fusion |
| topic | Laser powder bed fusion Porosity Corrosion AlSi10Mg X-ray tomography UCTD Engineering, built environment and information technology theses SDG-04 SDG-04: Quality education Engineering, built environment and information technology theses SDG-08 SDG-08: Decent work and economic growth Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action Engineering, built environment and information technology theses SDG-14 SDG-14: Life below water |
| url | http://hdl.handle.net/2263/81138 |