Microstructure and Mechanical Property Correlation Between Rotary Friction Welded Nitinol–Nitinol Joints

In the present study, a rotary friction process was used to join nitinol in a similar welding combination. Macro- and microstructure characteristics of the weld zone were compared with adjacent zones and the base metal. The hardness and tensile properties of the joints were evaluated, and the result...

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Autores principales:	Ateekh Ur Rehman, Nagumothu Kishore Babu, Mahesh Kumar Talari, Yusuf Siraj Usmani, Hisham Al-Khalefah
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	rotary friction welding nitinol alloy phase transformation hardness tensile properties Technology T
Acceso en línea:	https://doaj.org/article/add1ba16fd5f4177a30cc6dd2fd390ab
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id	oai:doaj.org-article:add1ba16fd5f4177a30cc6dd2fd390ab
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spelling	oai:doaj.org-article:add1ba16fd5f4177a30cc6dd2fd390ab2021-11-11T05:33:42ZMicrostructure and Mechanical Property Correlation Between Rotary Friction Welded Nitinol–Nitinol Joints2296-801610.3389/fmats.2021.726383https://doaj.org/article/add1ba16fd5f4177a30cc6dd2fd390ab2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmats.2021.726383/fullhttps://doaj.org/toc/2296-8016In the present study, a rotary friction process was used to join nitinol in a similar welding combination. Macro- and microstructure characteristics of the weld zone were compared with adjacent zones and the base metal. The hardness and tensile properties of the joints were evaluated, and the results were discussed in relation to the weld microstructure. The weld macrostructure revealed a uniform flash around the circumference of the weld. The optical microstructure of the welded sample revealed fine recrystallized grains at the weld interface due to heavy deformation followed by dynamic recrystallization. The phase transformation behavior of the base metal and welded samples was studied by using a differential scanning calorimeter (DSC). The drift in phase transformation temperatures after rotary friction welding may be attributed to fine grain formation at the weld interface. Friction welded samples exhibited improved yield strength and hardness values compared to the base metal due to grain refinement at the weld interface.Ateekh Ur RehmanNagumothu Kishore BabuMahesh Kumar TalariYusuf Siraj UsmaniHisham Al-KhalefahFrontiers Media S.A.articlerotary friction weldingnitinol alloyphase transformationhardnesstensile propertiesTechnologyTENFrontiers in Materials, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	rotary friction welding nitinol alloy phase transformation hardness tensile properties Technology T
spellingShingle	rotary friction welding nitinol alloy phase transformation hardness tensile properties Technology T Ateekh Ur Rehman Nagumothu Kishore Babu Mahesh Kumar Talari Yusuf Siraj Usmani Hisham Al-Khalefah Microstructure and Mechanical Property Correlation Between Rotary Friction Welded Nitinol–Nitinol Joints
description	In the present study, a rotary friction process was used to join nitinol in a similar welding combination. Macro- and microstructure characteristics of the weld zone were compared with adjacent zones and the base metal. The hardness and tensile properties of the joints were evaluated, and the results were discussed in relation to the weld microstructure. The weld macrostructure revealed a uniform flash around the circumference of the weld. The optical microstructure of the welded sample revealed fine recrystallized grains at the weld interface due to heavy deformation followed by dynamic recrystallization. The phase transformation behavior of the base metal and welded samples was studied by using a differential scanning calorimeter (DSC). The drift in phase transformation temperatures after rotary friction welding may be attributed to fine grain formation at the weld interface. Friction welded samples exhibited improved yield strength and hardness values compared to the base metal due to grain refinement at the weld interface.
format	article
author	Ateekh Ur Rehman Nagumothu Kishore Babu Mahesh Kumar Talari Yusuf Siraj Usmani Hisham Al-Khalefah
author_facet	Ateekh Ur Rehman Nagumothu Kishore Babu Mahesh Kumar Talari Yusuf Siraj Usmani Hisham Al-Khalefah
author_sort	Ateekh Ur Rehman
title	Microstructure and Mechanical Property Correlation Between Rotary Friction Welded Nitinol–Nitinol Joints
title_short	Microstructure and Mechanical Property Correlation Between Rotary Friction Welded Nitinol–Nitinol Joints
title_full	Microstructure and Mechanical Property Correlation Between Rotary Friction Welded Nitinol–Nitinol Joints
title_fullStr	Microstructure and Mechanical Property Correlation Between Rotary Friction Welded Nitinol–Nitinol Joints
title_full_unstemmed	Microstructure and Mechanical Property Correlation Between Rotary Friction Welded Nitinol–Nitinol Joints
title_sort	microstructure and mechanical property correlation between rotary friction welded nitinol–nitinol joints
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/add1ba16fd5f4177a30cc6dd2fd390ab
work_keys_str_mv	AT ateekhurrehman microstructureandmechanicalpropertycorrelationbetweenrotaryfrictionweldednitinolnitinoljoints AT nagumothukishorebabu microstructureandmechanicalpropertycorrelationbetweenrotaryfrictionweldednitinolnitinoljoints AT maheshkumartalari microstructureandmechanicalpropertycorrelationbetweenrotaryfrictionweldednitinolnitinoljoints AT yusufsirajusmani microstructureandmechanicalpropertycorrelationbetweenrotaryfrictionweldednitinolnitinoljoints AT hishamalkhalefah microstructureandmechanicalpropertycorrelationbetweenrotaryfrictionweldednitinolnitinoljoints
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Microstructure and Mechanical Property Correlation Between Rotary Friction Welded Nitinol–Nitinol Joints

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