Effect of pulsation in TIG welding on the microstructure, residual stresses, tensile and impact properties of Ti-5Al-2.5Sn alloy

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@article{879b7bcb442d4f6b8a666167a0073e3a,
title = "Effect of pulsation in TIG welding on the microstructure, residual stresses, tensile and impact properties of Ti-5Al-2.5Sn alloy",
abstract = "Pulsation of current is widely employed in Tungsten Inert Gas (TIG) welding of titanium alloys. In the current study, the influence of welding speed and welding currents (peak and background) on the properties pulsed TIG welded Ti-5Al-2.5Sn alloy were investigated. The weldment characteristics which were analyzed included weld zone size, microstructure, residual stresses, tensile and impact properties. Increasing the welding speed and gradient of pulsed current enhanced grain strengthening in the fusion zone (FZ) which was attributed to increased cooling rate. Such a welding condition was also favorable in achieving full penetration weldments with a reduced; heat affected zone width, grain size in FZ and residual stresses. However, a tensile strength superior to the base metal was observed. The impact toughness reduced by increasing the pulsed current gradient and a high value of both peak and background currents were required to improve the impact toughness of the weldments.",
keywords = "grain boundaries, impact toughness, microstructure, residual stress, Titanium alloys, tungsten inert gas welding",
author = "Khan, {Fahd Nawaz} and Massab Junaid and Hassan, {Ali Abdelhafeez} and Baig, {Mirza Nadeem}",
note = "Funding Information: The authors wish to thank Pakistan Welding Institute and Pakistan Institute of Engineering and Applied Sciences for use of research facilities. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The authors would like to thank Ghulam Ishaq Khan Institute of Engineering Sciences and Technology for providing funding for this project. Publisher Copyright: {\textcopyright} IMechE 2020.",
year = "2021",
month = apr,
day = "1",
doi = "10.1177/0954408920964689",
language = "English",
volume = "235",
pages = "361--370",
journal = "Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering",
issn = "0954-4089",
publisher = "SAGE Publications",
number = "2",

}

RIS

TY - JOUR

T1 - Effect of pulsation in TIG welding on the microstructure, residual stresses, tensile and impact properties of Ti-5Al-2.5Sn alloy

AU - Khan, Fahd Nawaz

AU - Junaid, Massab

AU - Hassan, Ali Abdelhafeez

AU - Baig, Mirza Nadeem

N1 - Funding Information: The authors wish to thank Pakistan Welding Institute and Pakistan Institute of Engineering and Applied Sciences for use of research facilities. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The authors would like to thank Ghulam Ishaq Khan Institute of Engineering Sciences and Technology for providing funding for this project. Publisher Copyright: © IMechE 2020.

PY - 2021/4/1

Y1 - 2021/4/1

N2 - Pulsation of current is widely employed in Tungsten Inert Gas (TIG) welding of titanium alloys. In the current study, the influence of welding speed and welding currents (peak and background) on the properties pulsed TIG welded Ti-5Al-2.5Sn alloy were investigated. The weldment characteristics which were analyzed included weld zone size, microstructure, residual stresses, tensile and impact properties. Increasing the welding speed and gradient of pulsed current enhanced grain strengthening in the fusion zone (FZ) which was attributed to increased cooling rate. Such a welding condition was also favorable in achieving full penetration weldments with a reduced; heat affected zone width, grain size in FZ and residual stresses. However, a tensile strength superior to the base metal was observed. The impact toughness reduced by increasing the pulsed current gradient and a high value of both peak and background currents were required to improve the impact toughness of the weldments.

AB - Pulsation of current is widely employed in Tungsten Inert Gas (TIG) welding of titanium alloys. In the current study, the influence of welding speed and welding currents (peak and background) on the properties pulsed TIG welded Ti-5Al-2.5Sn alloy were investigated. The weldment characteristics which were analyzed included weld zone size, microstructure, residual stresses, tensile and impact properties. Increasing the welding speed and gradient of pulsed current enhanced grain strengthening in the fusion zone (FZ) which was attributed to increased cooling rate. Such a welding condition was also favorable in achieving full penetration weldments with a reduced; heat affected zone width, grain size in FZ and residual stresses. However, a tensile strength superior to the base metal was observed. The impact toughness reduced by increasing the pulsed current gradient and a high value of both peak and background currents were required to improve the impact toughness of the weldments.

KW - grain boundaries

KW - impact toughness

KW - microstructure

KW - residual stress

KW - Titanium alloys

KW - tungsten inert gas welding

UR - http://www.scopus.com/inward/record.url?scp=85092421105&partnerID=8YFLogxK

U2 - 10.1177/0954408920964689

DO - 10.1177/0954408920964689

M3 - Article

AN - SCOPUS:85092421105

VL - 235

SP - 361

EP - 370

JO - Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering

JF - Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering

SN - 0954-4089

IS - 2

ER -