Parametric study of carbide precipitation in 16% chromium ferritic stainless steel (FSS) welds
Other than grain coarsening, the loss of corrosion resistance in ferritic stainless steel (FSS) welds due to intergranular precipitation of chromium carbides restricts the use of the alloy for structural application. The use of cryogenic cooling offers dual opportunities for the control of weld geom...
| Main Authors: | , |
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| Format: | Proceeding Paper |
| Language: | English |
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2011
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| Online Access: | http://irep.iium.edu.my/6063/ http://irep.iium.edu.my/6063/1/Carbide_precipitation_in_FSS_welds.pdf |
| _version_ | 1848776608315342848 |
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| author | Amuda, Muhammed Olawale Hakeem Mridha, Shahjahan |
| author_facet | Amuda, Muhammed Olawale Hakeem Mridha, Shahjahan |
| author_sort | Amuda, Muhammed Olawale Hakeem |
| building | IIUM Repository |
| collection | Online Access |
| description | Other than grain coarsening, the loss of corrosion resistance in ferritic stainless steel (FSS) welds due to intergranular precipitation of chromium carbides restricts the use of the alloy for structural application. The use of cryogenic cooling offers dual opportunities for the control of weld geometry and grain structure in FSS. This results in improved mechanical properties but the effect on carbide precipitation was not investigated. In this paper, the effect of heat flux, welding speed and flow rate of cryogenic liquid on carbide precipitation in 16% chromium FSS welds are discussed. The use of cryogenic cooling reduces the size of the sensitized zone but this is not significantly affected by the flow rate of the cryogenic fluid. Compared to the conventional welding, the cryogenic cooling increases the cooling rate and reduces the martensite content in the high temperature heat affected zone (HTHAZ) by about 20%. This results in wider ditched-structure in welds made with flow rates lower than 0.052L/min. Cryogenic cooling produces more ditched weld microstructure revealed by electrolytic etching in oxalic acid; however, the structure is acceptable since no single grain boundary is completely surrounded by ditches. |
| first_indexed | 2025-11-14T14:32:48Z |
| format | Proceeding Paper |
| id | iium-6063 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T14:32:48Z |
| publishDate | 2011 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-60632011-11-21T21:19:08Z http://irep.iium.edu.my/6063/ Parametric study of carbide precipitation in 16% chromium ferritic stainless steel (FSS) welds Amuda, Muhammed Olawale Hakeem Mridha, Shahjahan TN600 Metallurgy Other than grain coarsening, the loss of corrosion resistance in ferritic stainless steel (FSS) welds due to intergranular precipitation of chromium carbides restricts the use of the alloy for structural application. The use of cryogenic cooling offers dual opportunities for the control of weld geometry and grain structure in FSS. This results in improved mechanical properties but the effect on carbide precipitation was not investigated. In this paper, the effect of heat flux, welding speed and flow rate of cryogenic liquid on carbide precipitation in 16% chromium FSS welds are discussed. The use of cryogenic cooling reduces the size of the sensitized zone but this is not significantly affected by the flow rate of the cryogenic fluid. Compared to the conventional welding, the cryogenic cooling increases the cooling rate and reduces the martensite content in the high temperature heat affected zone (HTHAZ) by about 20%. This results in wider ditched-structure in welds made with flow rates lower than 0.052L/min. Cryogenic cooling produces more ditched weld microstructure revealed by electrolytic etching in oxalic acid; however, the structure is acceptable since no single grain boundary is completely surrounded by ditches. 2011 Proceeding Paper NonPeerReviewed application/pdf en http://irep.iium.edu.my/6063/1/Carbide_precipitation_in_FSS_welds.pdf Amuda, Muhammed Olawale Hakeem and Mridha, Shahjahan (2011) Parametric study of carbide precipitation in 16% chromium ferritic stainless steel (FSS) welds. In: 14th International Conference on Advances in Material and Processing Technologies (AMPT 2011), 13-16 July 2011, Istanbul, Turkey. (Unpublished) http://www.ampt2011.org/en/ |
| spellingShingle | TN600 Metallurgy Amuda, Muhammed Olawale Hakeem Mridha, Shahjahan Parametric study of carbide precipitation in 16% chromium ferritic stainless steel (FSS) welds |
| title | Parametric study of carbide precipitation in 16% chromium ferritic stainless steel (FSS) welds |
| title_full | Parametric study of carbide precipitation in 16% chromium ferritic stainless steel (FSS) welds |
| title_fullStr | Parametric study of carbide precipitation in 16% chromium ferritic stainless steel (FSS) welds |
| title_full_unstemmed | Parametric study of carbide precipitation in 16% chromium ferritic stainless steel (FSS) welds |
| title_short | Parametric study of carbide precipitation in 16% chromium ferritic stainless steel (FSS) welds |
| title_sort | parametric study of carbide precipitation in 16% chromium ferritic stainless steel (fss) welds |
| topic | TN600 Metallurgy |
| url | http://irep.iium.edu.my/6063/ http://irep.iium.edu.my/6063/ http://irep.iium.edu.my/6063/1/Carbide_precipitation_in_FSS_welds.pdf |