Influence of Welding Parameters on the Mechanical Properties and Microstructure of 7075-T651 Aluminum Alloys Welded Joints Performed by FSW Process
Abstract Aluminum alloys of 7xxx series have excellent characteristics and mechanical properties, being widely used in primary aircraft structures. However, the welding of these alloys by conventional arc welding processes results in an excessive mechanical resistance degradation and increasing in r...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2022-08-01
|
| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392022000100352&tlng=en |
| _version_ | 1828353303953539072 |
|---|---|
| author | Jefferson Segundo de Lima Oclávio Coutinho dos Santos Antônio Almeida Silva Raphael Henrique Falcão de Melo Theophilo Moura Maciel |
| author_facet | Jefferson Segundo de Lima Oclávio Coutinho dos Santos Antônio Almeida Silva Raphael Henrique Falcão de Melo Theophilo Moura Maciel |
| author_sort | Jefferson Segundo de Lima |
| collection | DOAJ |
| description | Abstract Aluminum alloys of 7xxx series have excellent characteristics and mechanical properties, being widely used in primary aircraft structures. However, the welding of these alloys by conventional arc welding processes results in an excessive mechanical resistance degradation and increasing in residual stress level. In this context, Friction Stir Welding (FSW) process has received attention in recent years mainly because it does not reach the materials melting point during the process. This work aims to evaluate the influence of the tool rotation and welding speed on microstructure and mechanical properties of AA 7075-T651 aluminum alloy welded joints by FSW process. Therefore, four welded joints obtained with different welding and tool rotation speed were subjected to tensile and microhardness tests. The microstructures of the welded joints were evaluated through analysis by optical microscopy and Scanning Electron Microscopy (SEM). The retreating side of the welded joints showed a higher occurrence of microstructural welding defects. Welded joints with yield strength (YS) 50% higher than those of base metal and with ultimate tensile strength up to 380 MPa were achieved. |
| first_indexed | 2024-04-14T02:06:51Z |
| format | Article |
| id | doaj.art-65d26e15e3414efe9624b1624f4ec89a |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-04-14T02:06:51Z |
| publishDate | 2022-08-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-65d26e15e3414efe9624b1624f4ec89a2022-12-22T02:18:39ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392022-08-012510.1590/1980-5373-mr-2021-0629Influence of Welding Parameters on the Mechanical Properties and Microstructure of 7075-T651 Aluminum Alloys Welded Joints Performed by FSW ProcessJefferson Segundo de Limahttps://orcid.org/0000-0003-4719-4562Oclávio Coutinho dos Santoshttps://orcid.org/0000-0003-3709-8489Antônio Almeida Silvahttps://orcid.org/0000-0002-7130-8542Raphael Henrique Falcão de Melohttps://orcid.org/0000-0002-8979-4008Theophilo Moura Macielhttps://orcid.org/0000-0002-2539-3336Abstract Aluminum alloys of 7xxx series have excellent characteristics and mechanical properties, being widely used in primary aircraft structures. However, the welding of these alloys by conventional arc welding processes results in an excessive mechanical resistance degradation and increasing in residual stress level. In this context, Friction Stir Welding (FSW) process has received attention in recent years mainly because it does not reach the materials melting point during the process. This work aims to evaluate the influence of the tool rotation and welding speed on microstructure and mechanical properties of AA 7075-T651 aluminum alloy welded joints by FSW process. Therefore, four welded joints obtained with different welding and tool rotation speed were subjected to tensile and microhardness tests. The microstructures of the welded joints were evaluated through analysis by optical microscopy and Scanning Electron Microscopy (SEM). The retreating side of the welded joints showed a higher occurrence of microstructural welding defects. Welded joints with yield strength (YS) 50% higher than those of base metal and with ultimate tensile strength up to 380 MPa were achieved.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392022000100352&tlng=enWelded jointFriction Stir Welding7075-T651 Aluminum AlloyMicrostructureMechanical properties |
| spellingShingle | Jefferson Segundo de Lima Oclávio Coutinho dos Santos Antônio Almeida Silva Raphael Henrique Falcão de Melo Theophilo Moura Maciel Influence of Welding Parameters on the Mechanical Properties and Microstructure of 7075-T651 Aluminum Alloys Welded Joints Performed by FSW Process Materials Research Welded joint Friction Stir Welding 7075-T651 Aluminum Alloy Microstructure Mechanical properties |
| title | Influence of Welding Parameters on the Mechanical Properties and Microstructure of 7075-T651 Aluminum Alloys Welded Joints Performed by FSW Process |
| title_full | Influence of Welding Parameters on the Mechanical Properties and Microstructure of 7075-T651 Aluminum Alloys Welded Joints Performed by FSW Process |
| title_fullStr | Influence of Welding Parameters on the Mechanical Properties and Microstructure of 7075-T651 Aluminum Alloys Welded Joints Performed by FSW Process |
| title_full_unstemmed | Influence of Welding Parameters on the Mechanical Properties and Microstructure of 7075-T651 Aluminum Alloys Welded Joints Performed by FSW Process |
| title_short | Influence of Welding Parameters on the Mechanical Properties and Microstructure of 7075-T651 Aluminum Alloys Welded Joints Performed by FSW Process |
| title_sort | influence of welding parameters on the mechanical properties and microstructure of 7075 t651 aluminum alloys welded joints performed by fsw process |
| topic | Welded joint Friction Stir Welding 7075-T651 Aluminum Alloy Microstructure Mechanical properties |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392022000100352&tlng=en |
| work_keys_str_mv | AT jeffersonsegundodelima influenceofweldingparametersonthemechanicalpropertiesandmicrostructureof7075t651aluminumalloysweldedjointsperformedbyfswprocess AT oclaviocoutinhodossantos influenceofweldingparametersonthemechanicalpropertiesandmicrostructureof7075t651aluminumalloysweldedjointsperformedbyfswprocess AT antonioalmeidasilva influenceofweldingparametersonthemechanicalpropertiesandmicrostructureof7075t651aluminumalloysweldedjointsperformedbyfswprocess AT raphaelhenriquefalcaodemelo influenceofweldingparametersonthemechanicalpropertiesandmicrostructureof7075t651aluminumalloysweldedjointsperformedbyfswprocess AT theophilomouramaciel influenceofweldingparametersonthemechanicalpropertiesandmicrostructureof7075t651aluminumalloysweldedjointsperformedbyfswprocess |