Parametric study of carbide precipitation in 16wt% 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...

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Main Authors:	Amuda, Muhammed Olawale Hakeem, Mridha, Shahjahan
Format:	Article
Language:	English
Published:	Trans Tech Publications, Switzerland 2012
Subjects:	TN600 Metallurgy
Online Access:	http://irep.iium.edu.my/23364/ http://irep.iium.edu.my/23364/ http://irep.iium.edu.my/23364/ http://irep.iium.edu.my/23364/1/AMR.445.723.pdf

id	iium-23364
recordtype	eprints
spelling	iium-233642012-08-13T02:15:41Z http://irep.iium.edu.my/23364/ Parametric study of carbide precipitation in 16wt% 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. Trans Tech Publications, Switzerland 2012-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/23364/1/AMR.445.723.pdf Amuda, Muhammed Olawale Hakeem and Mridha, Shahjahan (2012) Parametric study of carbide precipitation in 16wt% chromium ferritic stainless steel (FSS) welds. Advanced Materials Research, 445. pp. 723-728. ISSN 1022-6680 http://www.scientific.net/AMR.445.723 10.4028/www.scientific.net/AMR.445.723
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TN600 Metallurgy
spellingShingle	TN600 Metallurgy Amuda, Muhammed Olawale Hakeem Mridha, Shahjahan Parametric study of carbide precipitation in 16wt% chromium ferritic stainless steel (FSS) welds
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.
format	Article
author	Amuda, Muhammed Olawale Hakeem Mridha, Shahjahan
author_facet	Amuda, Muhammed Olawale Hakeem Mridha, Shahjahan
author_sort	Amuda, Muhammed Olawale Hakeem
title	Parametric study of carbide precipitation in 16wt% chromium ferritic stainless steel (FSS) welds
title_short	Parametric study of carbide precipitation in 16wt% chromium ferritic stainless steel (FSS) welds
title_full	Parametric study of carbide precipitation in 16wt% chromium ferritic stainless steel (FSS) welds
title_fullStr	Parametric study of carbide precipitation in 16wt% chromium ferritic stainless steel (FSS) welds
title_full_unstemmed	Parametric study of carbide precipitation in 16wt% chromium ferritic stainless steel (FSS) welds
title_sort	parametric study of carbide precipitation in 16wt% chromium ferritic stainless steel (fss) welds
publisher	Trans Tech Publications, Switzerland
publishDate	2012
url	http://irep.iium.edu.my/23364/ http://irep.iium.edu.my/23364/ http://irep.iium.edu.my/23364/ http://irep.iium.edu.my/23364/1/AMR.445.723.pdf
first_indexed	2023-09-18T20:35:23Z
last_indexed	2023-09-18T20:35:23Z
_version_	1777409011244597248

Parametric study of carbide precipitation in 16wt% chromium ferritic stainless steel (FSS) welds

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