Effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds

Medium chromium ferritic stainless steel conforming to AISI 430 was TIG-welded with different energy input 205J/mm ≤ HI ≤ 2304J/mm in argon shielding environment and characterized for microstructural features as well as mechanical properties. Macro profiling of the weld section show large distortion...

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Main Authors:	Amuda, Muhammed Olawale Hakeem, Mridha, Shahjahan
Format:	Conference or Workshop Item
Language:	English
Published:	2011
Subjects:	TN600 Metallurgy
Online Access:	http://irep.iium.edu.my/9661/ http://irep.iium.edu.my/9661/ http://irep.iium.edu.my/9661/1/mohamuda_smridha_MAPT2011_conferenceproceedings.pdf

id	iium-9661
recordtype	eprints
spelling	iium-96612011-12-12T13:22:40Z http://irep.iium.edu.my/9661/ Effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds Amuda, Muhammed Olawale Hakeem Mridha, Shahjahan TN600 Metallurgy Medium chromium ferritic stainless steel conforming to AISI 430 was TIG-welded with different energy input 205J/mm ≤ HI ≤ 2304J/mm in argon shielding environment and characterized for microstructural features as well as mechanical properties. Macro profiling of the weld section show large distortion with wider HAZ as the energy input increases. The optical microscopy and XRD characterization of the weld section revealed the presence of high temperature delta ferrite (71%), martensite (19%) and intergranular carbide precipitates (10%). Grain growth in the weld section can be up to 16 times the grain size of the base metal while the grain structure changed from columnar grains to equiaxed grains as the welding speed increases particularly between 2.5 and 3.5mm/s. The loss in mechanical property in the weld section is 20-56% of the base metal though the loss is more pronounced in welds made with energy input greater than 1576J/mm. This level of loss is an improvement over the published values for GTA welded ferritic stainless steel. The fractograph of the weld show different failure modes of dimple and cleavage fracture depending on the energy input. The present work has shown that using an energy input rate greater than 1576J/mm during GTA welding of medium chromium ferritic stainless steel severely reduces the weld section strength and encourages cleavage fracture. 2011-06-03 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/9661/1/mohamuda_smridha_MAPT2011_conferenceproceedings.pdf Amuda, Muhammed Olawale Hakeem and Mridha, Shahjahan (2011) Effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds. In: International Conference on Materials Processing Technology (MAPT 2011), 2-3 June 2011, Phuket, Thailand. http://mapt2011.kmutt.ac.th/
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 Effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds
description	Medium chromium ferritic stainless steel conforming to AISI 430 was TIG-welded with different energy input 205J/mm ≤ HI ≤ 2304J/mm in argon shielding environment and characterized for microstructural features as well as mechanical properties. Macro profiling of the weld section show large distortion with wider HAZ as the energy input increases. The optical microscopy and XRD characterization of the weld section revealed the presence of high temperature delta ferrite (71%), martensite (19%) and intergranular carbide precipitates (10%). Grain growth in the weld section can be up to 16 times the grain size of the base metal while the grain structure changed from columnar grains to equiaxed grains as the welding speed increases particularly between 2.5 and 3.5mm/s. The loss in mechanical property in the weld section is 20-56% of the base metal though the loss is more pronounced in welds made with energy input greater than 1576J/mm. This level of loss is an improvement over the published values for GTA welded ferritic stainless steel. The fractograph of the weld show different failure modes of dimple and cleavage fracture depending on the energy input. The present work has shown that using an energy input rate greater than 1576J/mm during GTA welding of medium chromium ferritic stainless steel severely reduces the weld section strength and encourages cleavage fracture.
format	Conference or Workshop Item
author	Amuda, Muhammed Olawale Hakeem Mridha, Shahjahan
author_facet	Amuda, Muhammed Olawale Hakeem Mridha, Shahjahan
author_sort	Amuda, Muhammed Olawale Hakeem
title	Effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds
title_short	Effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds
title_full	Effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds
title_fullStr	Effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds
title_full_unstemmed	Effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds
title_sort	effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds
publishDate	2011
url	http://irep.iium.edu.my/9661/ http://irep.iium.edu.my/9661/ http://irep.iium.edu.my/9661/1/mohamuda_smridha_MAPT2011_conferenceproceedings.pdf
first_indexed	2023-09-18T20:19:16Z
last_indexed	2023-09-18T20:19:16Z
_version_	1777407997486563328

Effect of energy input on microstructural features and mechanical properties of medium chromium ferritic stainless steel welds

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