TY  - JOUR
KW  - Failure modes; Heat treatment; Martensite; Spot welding; Textures; Welds
KW  -  Columnar grain; Double pulse currents; Equi-axed grains; Lath martensite; Post weld heat treatment; Resistance spot welding
KW  -  Heat resistance
ID  - scholars11039
N2  - 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.
IS  - 7-8
VL  - 105
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075180485&doi=10.1007%2fs00170-019-04569-2&partnerID=40&md5=97da2c2d42af9a9942d3d90379d2927f
A1  - Soomro, I.A.
A1  - Pedapati, S.R.
JF  - International Journal of Advanced Manufacturing Technology
Y1  - 2019///
SP  - 3249
TI  - 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
N1  - cited By 18
AV  - none
EP  - 3260
SN  - 02683768
PB  - Springer
ER  -