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Application of in situ post weld heat treatment using double pulse technology and its effect on microstructure and mechanical performance of resistance spot welded HSLA350 steel

In situ post weld heat treatment (PWHT) by applying a second pulse current during resistance spot welding (RSW) provides a new pathway to alter the microstructure of the fusion zone (FZ) and improves the mechanical performance of the RSW joint. In the present study, effect of the second pulse curren...

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Main Authors: Soomro, I.A., Pedapati, S.R.
Format: Article
Published: Springer 2019
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075180485&doi=10.1007%2fs00170-019-04569-2&partnerID=40&md5=97da2c2d42af9a9942d3d90379d2927f
http://eprints.utp.edu.my/24847/
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spelling my.utp.eprints.248472021-08-27T08:42:28Z Application of in situ post weld heat treatment using double pulse technology and its effect on microstructure and mechanical performance of resistance spot welded HSLA350 steel Soomro, I.A. Pedapati, S.R. In situ post weld heat treatment (PWHT) by applying a second pulse current during resistance spot welding (RSW) provides a new pathway to alter the microstructure of the fusion zone (FZ) and improves the mechanical performance of the RSW joint. In the present study, effect of the second pulse current on microstructural characteristics and mechanical performance of resistance spot weld joint of HSLA350 steel under were investigated. It was observed that after applying the second pulse current during welding process, it subdivides the initial solidified fusion zone into two zones, namely equiaxed grain zone (EGZ) and columnar grain zone (CGZ). The outer layer becomes EGZ consisting of quasi-equiaxed grains of ferrite and martensite whereas the inner core is CGZ solidified with a columnar grain structure consisting of martensite and some bainite. The refinement of microstructure in the case of double pulse weld resulted in enhanced tensile shear strength and failure energy absorption capacity with ductile pullout failure mode. © 2019, Springer-Verlag London Ltd., part of Springer Nature. Springer 2019 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075180485&doi=10.1007%2fs00170-019-04569-2&partnerID=40&md5=97da2c2d42af9a9942d3d90379d2927f Soomro, I.A. and Pedapati, S.R. (2019) Application of in situ post weld heat treatment using double pulse technology and its effect on microstructure and mechanical performance of resistance spot welded HSLA350 steel. International Journal of Advanced Manufacturing Technology, 105 (7-8). pp. 3249-3260. http://eprints.utp.edu.my/24847/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description In situ post weld heat treatment (PWHT) by applying a second pulse current during resistance spot welding (RSW) provides a new pathway to alter the microstructure of the fusion zone (FZ) and improves the mechanical performance of the RSW joint. In the present study, effect of the second pulse current on microstructural characteristics and mechanical performance of resistance spot weld joint of HSLA350 steel under were investigated. It was observed that after applying the second pulse current during welding process, it subdivides the initial solidified fusion zone into two zones, namely equiaxed grain zone (EGZ) and columnar grain zone (CGZ). The outer layer becomes EGZ consisting of quasi-equiaxed grains of ferrite and martensite whereas the inner core is CGZ solidified with a columnar grain structure consisting of martensite and some bainite. The refinement of microstructure in the case of double pulse weld resulted in enhanced tensile shear strength and failure energy absorption capacity with ductile pullout failure mode. © 2019, Springer-Verlag London Ltd., part of Springer Nature.
format Article
author Soomro, I.A.
Pedapati, S.R.
spellingShingle Soomro, I.A.
Pedapati, S.R.
Application of in situ post weld heat treatment using double pulse technology and its effect on microstructure and mechanical performance of resistance spot welded HSLA350 steel
author_facet Soomro, I.A.
Pedapati, S.R.
author_sort Soomro, I.A.
title Application of in situ post weld heat treatment using double pulse technology and its effect on microstructure and mechanical performance of resistance spot welded HSLA350 steel
title_short Application of in situ post weld heat treatment using double pulse technology and its effect on microstructure and mechanical performance of resistance spot welded HSLA350 steel
title_full Application of in situ post weld heat treatment using double pulse technology and its effect on microstructure and mechanical performance of resistance spot welded HSLA350 steel
title_fullStr Application of in situ post weld heat treatment using double pulse technology and its effect on microstructure and mechanical performance of resistance spot welded HSLA350 steel
title_full_unstemmed Application of in situ post weld heat treatment using double pulse technology and its effect on microstructure and mechanical performance of resistance spot welded HSLA350 steel
title_sort application of in situ post weld heat treatment using double pulse technology and its effect on microstructure and mechanical performance of resistance spot welded hsla350 steel
publisher Springer
publishDate 2019
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075180485&doi=10.1007%2fs00170-019-04569-2&partnerID=40&md5=97da2c2d42af9a9942d3d90379d2927f
http://eprints.utp.edu.my/24847/
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score 13.211869

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