Ultrasonic Welding of Nickel with Coarse and Ultrafine Grained Structures

Solid state joints of samples of coarse-grained (CG) and ultrafine-grained (UFG) nickel have been obtained for the first time using spot ultrasonic welding (USW). The UFG structure in disk-shaped samples was processed by means of high-pressure torsion (HPT). On the basis of lap shear tests, the opti...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Elvina R. Shayakhmetova, Mariya A. Murzinova, Ayrat A. Nazarov
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ultrasonic welding nickel microstructure ultrafine grained structure grain growth lap shear strength Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/82cef65c688d4dcdb5a5fc1228959e66
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:82cef65c688d4dcdb5a5fc1228959e66
record_format	dspace
spelling	oai:doaj.org-article:82cef65c688d4dcdb5a5fc1228959e662021-11-25T18:22:03ZUltrasonic Welding of Nickel with Coarse and Ultrafine Grained Structures10.3390/met111118002075-4701https://doaj.org/article/82cef65c688d4dcdb5a5fc1228959e662021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1800https://doaj.org/toc/2075-4701Solid state joints of samples of coarse-grained (CG) and ultrafine-grained (UFG) nickel have been obtained for the first time using spot ultrasonic welding (USW). The UFG structure in disk-shaped samples was processed by means of high-pressure torsion (HPT). On the basis of lap shear tests, the optimal values of the clamping force resulting in the highest values of the joint strength are determined. The microstructures in the weld joints obtained at optimal parameters of USW are characterized by scanning electron microscopy. It is shown that during ultrasonic welding of coarse-grained nickel, a thin layer with an UFG microstructure is formed near the weld surfaces. The bulks of sheets retain the CG microstructure, but a significant dislocation activity is observed in these regions. During USW of samples having an UFG initial microstructure, significant grain growth occurs. Fine grains are observed only along the welding interface. An average lap shear strength of 97 MPa was obtained by welding the UFG samples, which was approximately 40% higher than the strength of samples processed by welding coarse-grained sheets (70 MPa). It is concluded that higher strength weld joints can be obtained by using sheets with the UFG structure as compared to the CG sheets.Elvina R. ShayakhmetovaMariya A. MurzinovaAyrat A. NazarovMDPI AGarticleultrasonic weldingnickelmicrostructureultrafine grained structuregrain growthlap shear strengthMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1800, p 1800 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ultrasonic welding nickel microstructure ultrafine grained structure grain growth lap shear strength Mining engineering. Metallurgy TN1-997
spellingShingle	ultrasonic welding nickel microstructure ultrafine grained structure grain growth lap shear strength Mining engineering. Metallurgy TN1-997 Elvina R. Shayakhmetova Mariya A. Murzinova Ayrat A. Nazarov Ultrasonic Welding of Nickel with Coarse and Ultrafine Grained Structures
description	Solid state joints of samples of coarse-grained (CG) and ultrafine-grained (UFG) nickel have been obtained for the first time using spot ultrasonic welding (USW). The UFG structure in disk-shaped samples was processed by means of high-pressure torsion (HPT). On the basis of lap shear tests, the optimal values of the clamping force resulting in the highest values of the joint strength are determined. The microstructures in the weld joints obtained at optimal parameters of USW are characterized by scanning electron microscopy. It is shown that during ultrasonic welding of coarse-grained nickel, a thin layer with an UFG microstructure is formed near the weld surfaces. The bulks of sheets retain the CG microstructure, but a significant dislocation activity is observed in these regions. During USW of samples having an UFG initial microstructure, significant grain growth occurs. Fine grains are observed only along the welding interface. An average lap shear strength of 97 MPa was obtained by welding the UFG samples, which was approximately 40% higher than the strength of samples processed by welding coarse-grained sheets (70 MPa). It is concluded that higher strength weld joints can be obtained by using sheets with the UFG structure as compared to the CG sheets.
format	article
author	Elvina R. Shayakhmetova Mariya A. Murzinova Ayrat A. Nazarov
author_facet	Elvina R. Shayakhmetova Mariya A. Murzinova Ayrat A. Nazarov
author_sort	Elvina R. Shayakhmetova
title	Ultrasonic Welding of Nickel with Coarse and Ultrafine Grained Structures
title_short	Ultrasonic Welding of Nickel with Coarse and Ultrafine Grained Structures
title_full	Ultrasonic Welding of Nickel with Coarse and Ultrafine Grained Structures
title_fullStr	Ultrasonic Welding of Nickel with Coarse and Ultrafine Grained Structures
title_full_unstemmed	Ultrasonic Welding of Nickel with Coarse and Ultrafine Grained Structures
title_sort	ultrasonic welding of nickel with coarse and ultrafine grained structures
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/82cef65c688d4dcdb5a5fc1228959e66
work_keys_str_mv	AT elvinarshayakhmetova ultrasonicweldingofnickelwithcoarseandultrafinegrainedstructures AT mariyaamurzinova ultrasonicweldingofnickelwithcoarseandultrafinegrainedstructures AT ayratanazarov ultrasonicweldingofnickelwithcoarseandultrafinegrainedstructures
_version_	1718411269117050880

Ultrasonic Welding of Nickel with Coarse and Ultrafine Grained Structures

Ejemplares similares