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The effect of autogenous gas tungsten arc welding parameters on the solidification structure of two ferritic stainless steels
Dissertation (MEng)--University of Pretoria, 2019.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2021
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| _version_ | 1867613566866030592 |
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| access_status_str | Open Access |
| author2 | Pistorius, P.G.H. (Pieter) |
| author_browse | Pistorius, P.G.H. (Pieter) |
| author_facet | Pistorius, P.G.H. (Pieter) |
| collection | Thesis |
| dc_rights_str_mv | © 2020 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)--University of Pretoria, 2019. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/79303 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:11.690Z |
| 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:2263/79303 The effect of autogenous gas tungsten arc welding parameters on the solidification structure of two ferritic stainless steels Pistorius, P.G.H. (Pieter) prinsheinrich@gmail.com Prins, Heinrich Johann UCTD ferritic stainless steel pulsed current columnar grains equiaxed grains response surface regression 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 Dissertation (MEng)--University of Pretoria, 2019. Ferritic stainless steel is typically used in the automotive industry to fabricate welded tube that is plastically deformed for flanging, bending and necking. The effect of welding parameters during autogenous gastungsten arc welding (GTAW) of thin sheet on the weld metal structure and tensile properties were determined. Two grades of ferritic stainless steels, a titanium-containing Grade 441 and a titanium-free molybdenum-containing Grade 436, were used as base metal. Statistical analysis was used to determine the influence of welding parameters on the microstructure of autogenous GTAW welds. The results of Grade 441 indicated that the welding speed and peak welding current had a statistically significant influence on the amount of equiaxed grains that formed. For Grade 436, the same welding parameters (welding speed and peak welding current) had a statistically significant influence on the grain size of the weld metal grains. The ductility of a tensile test coupon machined parallel to the weld direction, for both base metal grades, was unaffected by the welding parameters or the weld metal microstructure. The elongation was determined by the amount of weld metal in the gauge area of a tensile coupon. The titanium content of the base material seems to have the most significant effect on the formation of equiaxed grains. mi2025 Materials Science and Metallurgical Engineering MEng 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 2021-04-06T07:22:48Z 2021-04-06T07:22:48Z 2020/04/29 2019 Dissertation Prins, HJ 2019, The effect of autogenous gas tungsten arc welding parameters on the solidification structure of two ferritic stainless steels, MEng Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/79303> A2020 http://hdl.handle.net/2263/79303 en © 2020 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 | UCTD ferritic stainless steel pulsed current columnar grains equiaxed grains response surface regression 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 The effect of autogenous gas tungsten arc welding parameters on the solidification structure of two ferritic stainless steels |
| title | The effect of autogenous gas tungsten arc welding parameters on the solidification structure of two ferritic stainless steels |
| title_full | The effect of autogenous gas tungsten arc welding parameters on the solidification structure of two ferritic stainless steels |
| title_fullStr | The effect of autogenous gas tungsten arc welding parameters on the solidification structure of two ferritic stainless steels |
| title_full_unstemmed | The effect of autogenous gas tungsten arc welding parameters on the solidification structure of two ferritic stainless steels |
| title_short | The effect of autogenous gas tungsten arc welding parameters on the solidification structure of two ferritic stainless steels |
| title_sort | effect of autogenous gas tungsten arc welding parameters on the solidification structure of two ferritic stainless steels |
| topic | UCTD ferritic stainless steel pulsed current columnar grains equiaxed grains response surface regression 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 |
| url | http://hdl.handle.net/2263/79303 |