EBSD Characterization of the Microstructure of 7A52 Aluminum Alloy Joints Welded by Friction Stir Welding

The microstructure and texture of materials significantly influence the mechanical properties and fracture behavior; the effect of microstructure in different zones of friction stir-welded joints of 7A52 aluminum alloy on fracture behavior was investigated in this paper. The microstructural characte...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Xu Liu, Ruiling Jia, Huixia Zhang, Wenhua Cheng, Xiwei Zhai
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	friction stir welding EBSD microstructure Taylor factor recrystallized grains Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/9a0c1e6a21d044dea838a738f6b9c395
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:9a0c1e6a21d044dea838a738f6b9c395
record_format	dspace
spelling	oai:doaj.org-article:9a0c1e6a21d044dea838a738f6b9c3952021-11-11T17:55:57ZEBSD Characterization of the Microstructure of 7A52 Aluminum Alloy Joints Welded by Friction Stir Welding10.3390/ma142163621996-1944https://doaj.org/article/9a0c1e6a21d044dea838a738f6b9c3952021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6362https://doaj.org/toc/1996-1944The microstructure and texture of materials significantly influence the mechanical properties and fracture behavior; the effect of microstructure in different zones of friction stir-welded joints of 7A52 aluminum alloy on fracture behavior was investigated in this paper. The microstructural characteristics of sections of the welded joints were tested using the electron backscattered diffraction (EBSD) technique. The results indicate that the fracture is located at the advancing side of the thermomechanically affected zone (AS-TMAZ) and the stir zone (SZ) interface. The AS-TMAZ microstructure is vastly different from the microstructure and texture of other areas. The grain orientation is disordered, and the grain shape is seriously deformed under the action of stirring force. The grain size grows unevenly under the input of friction heat, resulting in a large amount of recrystallization, and there is a significant difference in the Taylor factor between adjacent grains and the AS-TMAZ–SZ interface. On the contrary, there are fine and uniform equiaxed grains in the nugget zone, the microstructure is uniform, and the Taylor factor is small at adjacent grains. Therefore, the uneven transition of microstructure and texture in the AS-TMAZ and the SZ provide conditions for crack initiation, which become the weak point of mechanical properties.Xu LiuRuiling JiaHuixia ZhangWenhua ChengXiwei ZhaiMDPI AGarticlefriction stir weldingEBSDmicrostructureTaylor factorrecrystallized grainsTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6362, p 6362 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	friction stir welding EBSD microstructure Taylor factor recrystallized grains Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	friction stir welding EBSD microstructure Taylor factor recrystallized grains Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Xu Liu Ruiling Jia Huixia Zhang Wenhua Cheng Xiwei Zhai EBSD Characterization of the Microstructure of 7A52 Aluminum Alloy Joints Welded by Friction Stir Welding
description	The microstructure and texture of materials significantly influence the mechanical properties and fracture behavior; the effect of microstructure in different zones of friction stir-welded joints of 7A52 aluminum alloy on fracture behavior was investigated in this paper. The microstructural characteristics of sections of the welded joints were tested using the electron backscattered diffraction (EBSD) technique. The results indicate that the fracture is located at the advancing side of the thermomechanically affected zone (AS-TMAZ) and the stir zone (SZ) interface. The AS-TMAZ microstructure is vastly different from the microstructure and texture of other areas. The grain orientation is disordered, and the grain shape is seriously deformed under the action of stirring force. The grain size grows unevenly under the input of friction heat, resulting in a large amount of recrystallization, and there is a significant difference in the Taylor factor between adjacent grains and the AS-TMAZ–SZ interface. On the contrary, there are fine and uniform equiaxed grains in the nugget zone, the microstructure is uniform, and the Taylor factor is small at adjacent grains. Therefore, the uneven transition of microstructure and texture in the AS-TMAZ and the SZ provide conditions for crack initiation, which become the weak point of mechanical properties.
format	article
author	Xu Liu Ruiling Jia Huixia Zhang Wenhua Cheng Xiwei Zhai
author_facet	Xu Liu Ruiling Jia Huixia Zhang Wenhua Cheng Xiwei Zhai
author_sort	Xu Liu
title	EBSD Characterization of the Microstructure of 7A52 Aluminum Alloy Joints Welded by Friction Stir Welding
title_short	EBSD Characterization of the Microstructure of 7A52 Aluminum Alloy Joints Welded by Friction Stir Welding
title_full	EBSD Characterization of the Microstructure of 7A52 Aluminum Alloy Joints Welded by Friction Stir Welding
title_fullStr	EBSD Characterization of the Microstructure of 7A52 Aluminum Alloy Joints Welded by Friction Stir Welding
title_full_unstemmed	EBSD Characterization of the Microstructure of 7A52 Aluminum Alloy Joints Welded by Friction Stir Welding
title_sort	ebsd characterization of the microstructure of 7a52 aluminum alloy joints welded by friction stir welding
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9a0c1e6a21d044dea838a738f6b9c395
work_keys_str_mv	AT xuliu ebsdcharacterizationofthemicrostructureof7a52aluminumalloyjointsweldedbyfrictionstirwelding AT ruilingjia ebsdcharacterizationofthemicrostructureof7a52aluminumalloyjointsweldedbyfrictionstirwelding AT huixiazhang ebsdcharacterizationofthemicrostructureof7a52aluminumalloyjointsweldedbyfrictionstirwelding AT wenhuacheng ebsdcharacterizationofthemicrostructureof7a52aluminumalloyjointsweldedbyfrictionstirwelding AT xiweizhai ebsdcharacterizationofthemicrostructureof7a52aluminumalloyjointsweldedbyfrictionstirwelding
_version_	1718431959347101696

EBSD Characterization of the Microstructure of 7A52 Aluminum Alloy Joints Welded by Friction Stir Welding

Ejemplares similares