Relationship between solidification and liquation cracks in the joining of GTD-111 nickel-based superalloy by Nd:YAG pulsed-laser welding

Fusion welding of nickel-based superalloys with a total Al and Ti content of more than 6% has always been challenging. The reason for this is the occurrence of solidification and liquation cracks during welding. Investigating the mechanisms of formation of these two types of cracks can increase the...

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Autores principales:	Morteza Taheri, Mansour Razavi, Seyed Farshid Kashani-Bozorg, Mohammad Javad Torkamany
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Laser welding GTD-111 superalloy Solidification Liquation Crack Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/fe395c242e51472193784f91688255a6
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spelling	oai:doaj.org-article:fe395c242e51472193784f91688255a62021-11-22T04:26:14ZRelationship between solidification and liquation cracks in the joining of GTD-111 nickel-based superalloy by Nd:YAG pulsed-laser welding2238-785410.1016/j.jmrt.2021.11.007https://doaj.org/article/fe395c242e51472193784f91688255a62021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012862https://doaj.org/toc/2238-7854Fusion welding of nickel-based superalloys with a total Al and Ti content of more than 6% has always been challenging. The reason for this is the occurrence of solidification and liquation cracks during welding. Investigating the mechanisms of formation of these two types of cracks can increase the theoretical and practical insight necessary to achieve a welded alloy without cracks. The objective of this research was to look at the link between solidification and liquidation fractures in Nd:YAG pulsed-laser welded GTD-111 nickel-base superalloy joints. The reason for choosing the pulsed-laser method is the mechanism of continuous welding of the pulses and the creation of separate microstructural zones due to the high liquation and solidification speed. Liquation cracks in the partially melted zone (PMZ) of base metal were shown to be significantly associated with solidification cracks in the weld metal, according to the findings. Liquation cracks in PMZ act as a strong place to create and extend solidification cracks. It was also observed that with increasing pulse frequency, the tendency to form both types of cracks decreases due to the increased tendency to back-filling.Morteza TaheriMansour RazaviSeyed Farshid Kashani-BozorgMohammad Javad TorkamanyElsevierarticleLaser weldingGTD-111 superalloySolidificationLiquationCrackMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5635-5649 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Laser welding GTD-111 superalloy Solidification Liquation Crack Mining engineering. Metallurgy TN1-997
spellingShingle	Laser welding GTD-111 superalloy Solidification Liquation Crack Mining engineering. Metallurgy TN1-997 Morteza Taheri Mansour Razavi Seyed Farshid Kashani-Bozorg Mohammad Javad Torkamany Relationship between solidification and liquation cracks in the joining of GTD-111 nickel-based superalloy by Nd:YAG pulsed-laser welding
description	Fusion welding of nickel-based superalloys with a total Al and Ti content of more than 6% has always been challenging. The reason for this is the occurrence of solidification and liquation cracks during welding. Investigating the mechanisms of formation of these two types of cracks can increase the theoretical and practical insight necessary to achieve a welded alloy without cracks. The objective of this research was to look at the link between solidification and liquidation fractures in Nd:YAG pulsed-laser welded GTD-111 nickel-base superalloy joints. The reason for choosing the pulsed-laser method is the mechanism of continuous welding of the pulses and the creation of separate microstructural zones due to the high liquation and solidification speed. Liquation cracks in the partially melted zone (PMZ) of base metal were shown to be significantly associated with solidification cracks in the weld metal, according to the findings. Liquation cracks in PMZ act as a strong place to create and extend solidification cracks. It was also observed that with increasing pulse frequency, the tendency to form both types of cracks decreases due to the increased tendency to back-filling.
format	article
author	Morteza Taheri Mansour Razavi Seyed Farshid Kashani-Bozorg Mohammad Javad Torkamany
author_facet	Morteza Taheri Mansour Razavi Seyed Farshid Kashani-Bozorg Mohammad Javad Torkamany
author_sort	Morteza Taheri
title	Relationship between solidification and liquation cracks in the joining of GTD-111 nickel-based superalloy by Nd:YAG pulsed-laser welding
title_short	Relationship between solidification and liquation cracks in the joining of GTD-111 nickel-based superalloy by Nd:YAG pulsed-laser welding
title_full	Relationship between solidification and liquation cracks in the joining of GTD-111 nickel-based superalloy by Nd:YAG pulsed-laser welding
title_fullStr	Relationship between solidification and liquation cracks in the joining of GTD-111 nickel-based superalloy by Nd:YAG pulsed-laser welding
title_full_unstemmed	Relationship between solidification and liquation cracks in the joining of GTD-111 nickel-based superalloy by Nd:YAG pulsed-laser welding
title_sort	relationship between solidification and liquation cracks in the joining of gtd-111 nickel-based superalloy by nd:yag pulsed-laser welding
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/fe395c242e51472193784f91688255a6
work_keys_str_mv	AT mortezataheri relationshipbetweensolidificationandliquationcracksinthejoiningofgtd111nickelbasedsuperalloybyndyagpulsedlaserwelding AT mansourrazavi relationshipbetweensolidificationandliquationcracksinthejoiningofgtd111nickelbasedsuperalloybyndyagpulsedlaserwelding AT seyedfarshidkashanibozorg relationshipbetweensolidificationandliquationcracksinthejoiningofgtd111nickelbasedsuperalloybyndyagpulsedlaserwelding AT mohammadjavadtorkamany relationshipbetweensolidificationandliquationcracksinthejoiningofgtd111nickelbasedsuperalloybyndyagpulsedlaserwelding
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Relationship between solidification and liquation cracks in the joining of GTD-111 nickel-based superalloy by Nd:YAG pulsed-laser welding

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