eprintid: 11039
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/10/39
datestamp: 2023-11-10 03:25:36
lastmod: 2023-11-10 03:25:36
status_changed: 2023-11-10 01:14:23
type: article
metadata_visibility: show
creators_name: Soomro, I.A.
creators_name: Pedapati, S.R.
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
ispublished: pub
keywords: Failure modes; Heat treatment; Martensite; Spot welding; Textures; Welds, Columnar grain; Double pulse currents; Equi-axed grains; Lath martensite; Post weld heat treatment; Resistance spot welding, Heat resistance
note: cited By 18
abstract: 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.
date: 2019
publisher: Springer
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075180485&doi=10.1007%2fs00170-019-04569-2&partnerID=40&md5=97da2c2d42af9a9942d3d90379d2927f
id_number: 10.1007/s00170-019-04569-2
full_text_status: none
publication: International Journal of Advanced Manufacturing Technology
volume: 105
number: 7-8
pagerange: 3249-3260
refereed: TRUE
issn: 02683768
citation:   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.  ISSN 02683768