Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys

The spatter formation process was observed by high-speed imaging during the full-penetration laser welding (FPLW) process of 4 mm-thick TC4 alloy plates. The effects of process parameters on spatter formation were studied. The results showed that the process parameters have obvious effects on the fl...

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Autores principales:	Hao Cheng, Liangang Zhou, Qijun Li, Dong Du, Baohua Chang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Titanium alloys Full-penetration laser welding Spatter Plasma plume Keyhole Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/5023ff9ac9e240139ef2a7036c5dc5a6
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spelling	oai:doaj.org-article:5023ff9ac9e240139ef2a7036c5dc5a62021-11-20T05:06:37ZEffect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys2238-785410.1016/j.jmrt.2021.11.006https://doaj.org/article/5023ff9ac9e240139ef2a7036c5dc5a62021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012850https://doaj.org/toc/2238-7854The spatter formation process was observed by high-speed imaging during the full-penetration laser welding (FPLW) process of 4 mm-thick TC4 alloy plates. The effects of process parameters on spatter formation were studied. The results showed that the process parameters have obvious effects on the fluid flow characteristics in the melt pool and the dynamic behaviors of metal vapor in the keyhole, which and then affects the spatter behaviors. When using low-power and low-speed parameters, the fluid flow in the melt pool is unstable. When the melt flow impacts the keyhole, the keyhole opening diameter shrinks instantly, resulting in an immediate increase in the metal vapor eruption velocity at the keyhole opening and leading to the formation of weld spatter with a small size and high flying speed. When using high-power and high-speed parameters, a large amount of metal vapor erupts at high velocity from the keyhole opening transiently, resulting in the formation of a higher liquid column on the keyhole wall. The liquid column fractures to form weld spatter with a large size and low flying speed. When the pressure of the metal vapor in the keyhole is too large, the surface tension of the liquid metal under the keyhole cannot withstand it, causing an explosion on the backside of the melt pool. During the explosion, a large amount of spatter and plasma is ejected from the keyhole exit, and the plasma plume above the melt pool is weakened.Hao ChengLiangang ZhouQijun LiDong DuBaohua ChangElsevierarticleTitanium alloysFull-penetration laser weldingSpatterPlasma plumeKeyholeMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5516-5525 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Titanium alloys Full-penetration laser welding Spatter Plasma plume Keyhole Mining engineering. Metallurgy TN1-997
spellingShingle	Titanium alloys Full-penetration laser welding Spatter Plasma plume Keyhole Mining engineering. Metallurgy TN1-997 Hao Cheng Liangang Zhou Qijun Li Dong Du Baohua Chang Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys
description	The spatter formation process was observed by high-speed imaging during the full-penetration laser welding (FPLW) process of 4 mm-thick TC4 alloy plates. The effects of process parameters on spatter formation were studied. The results showed that the process parameters have obvious effects on the fluid flow characteristics in the melt pool and the dynamic behaviors of metal vapor in the keyhole, which and then affects the spatter behaviors. When using low-power and low-speed parameters, the fluid flow in the melt pool is unstable. When the melt flow impacts the keyhole, the keyhole opening diameter shrinks instantly, resulting in an immediate increase in the metal vapor eruption velocity at the keyhole opening and leading to the formation of weld spatter with a small size and high flying speed. When using high-power and high-speed parameters, a large amount of metal vapor erupts at high velocity from the keyhole opening transiently, resulting in the formation of a higher liquid column on the keyhole wall. The liquid column fractures to form weld spatter with a large size and low flying speed. When the pressure of the metal vapor in the keyhole is too large, the surface tension of the liquid metal under the keyhole cannot withstand it, causing an explosion on the backside of the melt pool. During the explosion, a large amount of spatter and plasma is ejected from the keyhole exit, and the plasma plume above the melt pool is weakened.
format	article
author	Hao Cheng Liangang Zhou Qijun Li Dong Du Baohua Chang
author_facet	Hao Cheng Liangang Zhou Qijun Li Dong Du Baohua Chang
author_sort	Hao Cheng
title	Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys
title_short	Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys
title_full	Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys
title_fullStr	Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys
title_full_unstemmed	Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys
title_sort	effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/5023ff9ac9e240139ef2a7036c5dc5a6
work_keys_str_mv	AT haocheng effectofweldingparametersonspatterformationinfullpenetrationlaserweldingoftitaniumalloys AT liangangzhou effectofweldingparametersonspatterformationinfullpenetrationlaserweldingoftitaniumalloys AT qijunli effectofweldingparametersonspatterformationinfullpenetrationlaserweldingoftitaniumalloys AT dongdu effectofweldingparametersonspatterformationinfullpenetrationlaserweldingoftitaniumalloys AT baohuachang effectofweldingparametersonspatterformationinfullpenetrationlaserweldingoftitaniumalloys
_version_	1718419595599020032

Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys

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