Cargando…

Effect of Welding Speed on Microstructure Evolution and Mechanical Properties of Friction Stir Welded 2198 Al-Cu-Li Alloy Joints

In the present study, 2198 Al-Cu-Li alloys were successfully friction stir welded by using various welding speed ranges of 90~180 mm/min with an invariable rotation speed of 950 r/min. The effect of welding speed on microstructure evolution and mechanical properties of the joints was investigated. T...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhang, Wenyan, Mao, Yuqing, Yang, Ping, Li, Ning, Ke, Liming, Chen, Yu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8838649/
https://www.ncbi.nlm.nih.gov/pubmed/35160915
http://dx.doi.org/10.3390/ma15030969
_version_ 1784650178370732032
author Zhang, Wenyan
Mao, Yuqing
Yang, Ping
Li, Ning
Ke, Liming
Chen, Yu
author_facet Zhang, Wenyan
Mao, Yuqing
Yang, Ping
Li, Ning
Ke, Liming
Chen, Yu
author_sort Zhang, Wenyan
collection PubMed
description In the present study, 2198 Al-Cu-Li alloys were successfully friction stir welded by using various welding speed ranges of 90~180 mm/min with an invariable rotation speed of 950 r/min. The effect of welding speed on microstructure evolution and mechanical properties of the joints was investigated. The results show that, with the welding speed decreasing, the size of the nugget zone (NZ) first increases and then decreases due to different welding temperatures. At a welding speed of 150 mm/min, the size of the NZ in all joints is the biggest and the “S” curve disappears. The equiaxed grains are finer, attributed to a higher degree of dynamic recrystallization, and a larger number of fine reprecipitated phase (δ’, β’ phases) particles are dispersively distributed in the NZ. Correspondingly, the joints have the highest tensile properties, and the tensile strength, yield strength and elongation are, respectively, 406 MPa, 289 MPa and 7.2%. However, compared to the base material, the tensile properties of all joints are reduced because a greater amount of δ’ and β’ phases particles are dissolved in the NZ. Only the joints produced at 150 mm/min are fractured in the TMAZ with detected deep dimples and tearing ridges, and a significant necking phenomenon is observed, which indicates a complete ductile fracture mode.
format Online
Article
Text
id pubmed-8838649
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-88386492022-02-13 Effect of Welding Speed on Microstructure Evolution and Mechanical Properties of Friction Stir Welded 2198 Al-Cu-Li Alloy Joints Zhang, Wenyan Mao, Yuqing Yang, Ping Li, Ning Ke, Liming Chen, Yu Materials (Basel) Article In the present study, 2198 Al-Cu-Li alloys were successfully friction stir welded by using various welding speed ranges of 90~180 mm/min with an invariable rotation speed of 950 r/min. The effect of welding speed on microstructure evolution and mechanical properties of the joints was investigated. The results show that, with the welding speed decreasing, the size of the nugget zone (NZ) first increases and then decreases due to different welding temperatures. At a welding speed of 150 mm/min, the size of the NZ in all joints is the biggest and the “S” curve disappears. The equiaxed grains are finer, attributed to a higher degree of dynamic recrystallization, and a larger number of fine reprecipitated phase (δ’, β’ phases) particles are dispersively distributed in the NZ. Correspondingly, the joints have the highest tensile properties, and the tensile strength, yield strength and elongation are, respectively, 406 MPa, 289 MPa and 7.2%. However, compared to the base material, the tensile properties of all joints are reduced because a greater amount of δ’ and β’ phases particles are dissolved in the NZ. Only the joints produced at 150 mm/min are fractured in the TMAZ with detected deep dimples and tearing ridges, and a significant necking phenomenon is observed, which indicates a complete ductile fracture mode. MDPI 2022-01-27 /pmc/articles/PMC8838649/ /pubmed/35160915 http://dx.doi.org/10.3390/ma15030969 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Wenyan
Mao, Yuqing
Yang, Ping
Li, Ning
Ke, Liming
Chen, Yu
Effect of Welding Speed on Microstructure Evolution and Mechanical Properties of Friction Stir Welded 2198 Al-Cu-Li Alloy Joints
title Effect of Welding Speed on Microstructure Evolution and Mechanical Properties of Friction Stir Welded 2198 Al-Cu-Li Alloy Joints
title_full Effect of Welding Speed on Microstructure Evolution and Mechanical Properties of Friction Stir Welded 2198 Al-Cu-Li Alloy Joints
title_fullStr Effect of Welding Speed on Microstructure Evolution and Mechanical Properties of Friction Stir Welded 2198 Al-Cu-Li Alloy Joints
title_full_unstemmed Effect of Welding Speed on Microstructure Evolution and Mechanical Properties of Friction Stir Welded 2198 Al-Cu-Li Alloy Joints
title_short Effect of Welding Speed on Microstructure Evolution and Mechanical Properties of Friction Stir Welded 2198 Al-Cu-Li Alloy Joints
title_sort effect of welding speed on microstructure evolution and mechanical properties of friction stir welded 2198 al-cu-li alloy joints
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8838649/
https://www.ncbi.nlm.nih.gov/pubmed/35160915
http://dx.doi.org/10.3390/ma15030969
work_keys_str_mv AT zhangwenyan effectofweldingspeedonmicrostructureevolutionandmechanicalpropertiesoffrictionstirwelded2198alculialloyjoints
AT maoyuqing effectofweldingspeedonmicrostructureevolutionandmechanicalpropertiesoffrictionstirwelded2198alculialloyjoints
AT yangping effectofweldingspeedonmicrostructureevolutionandmechanicalpropertiesoffrictionstirwelded2198alculialloyjoints
AT lining effectofweldingspeedonmicrostructureevolutionandmechanicalpropertiesoffrictionstirwelded2198alculialloyjoints
AT keliming effectofweldingspeedonmicrostructureevolutionandmechanicalpropertiesoffrictionstirwelded2198alculialloyjoints
AT chenyu effectofweldingspeedonmicrostructureevolutionandmechanicalpropertiesoffrictionstirwelded2198alculialloyjoints