Microstructure and Mechanical Properties of AA 6082/AISI 304 Joints Brazed Using Al-Ge-Si Filler Metal
Joining aluminum alloys with stainless steel is of great importance in many industrial sectors. Due to the low solidus temperatures of high-strength aluminum alloys, brazing with commercially available filler metals is not possible. Al-Ge-Si filler metals with a lower melting temperature of about 49...
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MDPI AG
2023-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/9/1574 |
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| author | Vasilii Fedorov Thomas Uhlig Guntram Wagner |
| author_facet | Vasilii Fedorov Thomas Uhlig Guntram Wagner |
| author_sort | Vasilii Fedorov |
| collection | DOAJ |
| description | Joining aluminum alloys with stainless steel is of great importance in many industrial sectors. Due to the low solidus temperatures of high-strength aluminum alloys, brazing with commercially available filler metals is not possible. Al-Ge-Si filler metals with a lower melting temperature of about 490 °C allow these alloys to be joined. They are manufactured in the form of foil via ultrafast solidification. AA 6082/AISI 304 joints are produced via induction brazing and vacuum furnace brazing. In this study, the tensile shear strength and the fatigue behavior of joints are investigated. Joints produced via induction brazing reached a maximum joining strength of 53 MPa, while vacuum-brazed joints achieved a maximum of 20 MPa. The fracture occurs in the reaction zone, especially inside the Al<sub>7</sub>Fe<sub>2</sub>(Si,Cr) intermetallic layer. The results of the fatigue tests show that the joints produced via induction brazing achieved 1 × 10<sup>7</sup> cycles at a stress amplitude of 7 MPa. Vacuum-brazed joints reached this at a stress amplitude of 3 MPa. All fatigue-tested samples fail in the reaction zone. The high hardness and growth of the SiGe solid solution and the Al<sub>7</sub>Fe<sub>2</sub>(Si,Cr) intermetallic layer had a major influence on the joining strength and fatigue behavior of AA 6082/AISI 304-brazed joints. |
| first_indexed | 2024-03-10T22:28:27Z |
| format | Article |
| id | doaj.art-df88f30a50894e519c7eed3b304a0e73 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T22:28:27Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
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| spelling | doaj.art-df88f30a50894e519c7eed3b304a0e732023-11-19T11:56:51ZengMDPI AGMetals2075-47012023-09-01139157410.3390/met13091574Microstructure and Mechanical Properties of AA 6082/AISI 304 Joints Brazed Using Al-Ge-Si Filler MetalVasilii Fedorov0Thomas Uhlig1Guntram Wagner2Group of Composites and Material Compounds, Institute of Materials Science and Engineering, Faculty of Mechanical Engineering, Chemnitz University of Technology, 09111 Chemnitz, GermanyGroup of Composites and Material Compounds, Institute of Materials Science and Engineering, Faculty of Mechanical Engineering, Chemnitz University of Technology, 09111 Chemnitz, GermanyGroup of Composites and Material Compounds, Institute of Materials Science and Engineering, Faculty of Mechanical Engineering, Chemnitz University of Technology, 09111 Chemnitz, GermanyJoining aluminum alloys with stainless steel is of great importance in many industrial sectors. Due to the low solidus temperatures of high-strength aluminum alloys, brazing with commercially available filler metals is not possible. Al-Ge-Si filler metals with a lower melting temperature of about 490 °C allow these alloys to be joined. They are manufactured in the form of foil via ultrafast solidification. AA 6082/AISI 304 joints are produced via induction brazing and vacuum furnace brazing. In this study, the tensile shear strength and the fatigue behavior of joints are investigated. Joints produced via induction brazing reached a maximum joining strength of 53 MPa, while vacuum-brazed joints achieved a maximum of 20 MPa. The fracture occurs in the reaction zone, especially inside the Al<sub>7</sub>Fe<sub>2</sub>(Si,Cr) intermetallic layer. The results of the fatigue tests show that the joints produced via induction brazing achieved 1 × 10<sup>7</sup> cycles at a stress amplitude of 7 MPa. Vacuum-brazed joints reached this at a stress amplitude of 3 MPa. All fatigue-tested samples fail in the reaction zone. The high hardness and growth of the SiGe solid solution and the Al<sub>7</sub>Fe<sub>2</sub>(Si,Cr) intermetallic layer had a major influence on the joining strength and fatigue behavior of AA 6082/AISI 304-brazed joints.https://www.mdpi.com/2075-4701/13/9/1574AA 6082AISI 304Al-Ge-Si brazing alloybrazingmechanical properties |
| spellingShingle | Vasilii Fedorov Thomas Uhlig Guntram Wagner Microstructure and Mechanical Properties of AA 6082/AISI 304 Joints Brazed Using Al-Ge-Si Filler Metal Metals AA 6082 AISI 304 Al-Ge-Si brazing alloy brazing mechanical properties |
| title | Microstructure and Mechanical Properties of AA 6082/AISI 304 Joints Brazed Using Al-Ge-Si Filler Metal |
| title_full | Microstructure and Mechanical Properties of AA 6082/AISI 304 Joints Brazed Using Al-Ge-Si Filler Metal |
| title_fullStr | Microstructure and Mechanical Properties of AA 6082/AISI 304 Joints Brazed Using Al-Ge-Si Filler Metal |
| title_full_unstemmed | Microstructure and Mechanical Properties of AA 6082/AISI 304 Joints Brazed Using Al-Ge-Si Filler Metal |
| title_short | Microstructure and Mechanical Properties of AA 6082/AISI 304 Joints Brazed Using Al-Ge-Si Filler Metal |
| title_sort | microstructure and mechanical properties of aa 6082 aisi 304 joints brazed using al ge si filler metal |
| topic | AA 6082 AISI 304 Al-Ge-Si brazing alloy brazing mechanical properties |
| url | https://www.mdpi.com/2075-4701/13/9/1574 |
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