Mechanical and Microstructural Characterization of Ultrasonic Welded NiTiCu Shape Memory Alloy Wires to Silver-Coated Copper Ferrules
The aim of this study was to investigate the mechanical behavior, and the microstructure of NiTiCu shape memory alloy wires joined with silver-coated copper ferrules via ultrasonic spot welding. Therefore, the electrical resistance was measured during tensile testing, and the joints were analyzed by...
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| Format: | Article |
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MDPI AG
2021-11-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/12/1936 |
| _version_ | 1827671191501930496 |
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| author | Toni Sprigode Andreas Gester Guntram Wagner Thomas Mäder Björn Senf Welf-Guntram Drossel |
| author_facet | Toni Sprigode Andreas Gester Guntram Wagner Thomas Mäder Björn Senf Welf-Guntram Drossel |
| author_sort | Toni Sprigode |
| collection | DOAJ |
| description | The aim of this study was to investigate the mechanical behavior, and the microstructure of NiTiCu shape memory alloy wires joined with silver-coated copper ferrules via ultrasonic spot welding. Therefore, the electrical resistance was measured during tensile testing, and the joints were analyzed by scanning electron microscopy. Energy-dispersive X-ray spectroscopy has determined the compounds of the developed welding zones. Furthermore, the influence of the ultrasonic welding on the transition temperatures of the NiTiCu wires was examined via differential scanning calorimetry. Tensile tests have shown that the ultimate tensile strengths of the joints reached almost 100% of that of the base material. An additional heat treatment rebuilt the typical shape memory alloy behavior after the ultrasonic welding process detwinned the martensitic wires. In addition, the B19′ structure of the welding zone and the ultrasonic spot-welding process did not affect the transition temperatures of the shape memory alloy. |
| first_indexed | 2024-03-10T03:34:38Z |
| format | Article |
| id | doaj.art-d3833b07ee9a4248903fcf0351799fdf |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T03:34:38Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-d3833b07ee9a4248903fcf0351799fdf2023-11-23T09:33:10ZengMDPI AGMetals2075-47012021-11-011112193610.3390/met11121936Mechanical and Microstructural Characterization of Ultrasonic Welded NiTiCu Shape Memory Alloy Wires to Silver-Coated Copper FerrulesToni Sprigode0Andreas Gester1Guntram Wagner2Thomas Mäder3Björn Senf4Welf-Guntram Drossel5Chair of Composites and Material Compounds, Institute of Materials Science and Engineering, Chemnitz University of Technology, 09125 Chemnitz, GermanyChair of Composites and Material Compounds, Institute of Materials Science and Engineering, Chemnitz University of Technology, 09125 Chemnitz, GermanyChair of Composites and Material Compounds, Institute of Materials Science and Engineering, Chemnitz University of Technology, 09125 Chemnitz, GermanyFraunhofer Institute for Machine Tools and Forming Technology IWU, 01187 Dresden, GermanyFraunhofer Institute for Machine Tools and Forming Technology IWU, 01187 Dresden, GermanyFraunhofer Institute for Machine Tools and Forming Technology IWU, 01187 Dresden, GermanyThe aim of this study was to investigate the mechanical behavior, and the microstructure of NiTiCu shape memory alloy wires joined with silver-coated copper ferrules via ultrasonic spot welding. Therefore, the electrical resistance was measured during tensile testing, and the joints were analyzed by scanning electron microscopy. Energy-dispersive X-ray spectroscopy has determined the compounds of the developed welding zones. Furthermore, the influence of the ultrasonic welding on the transition temperatures of the NiTiCu wires was examined via differential scanning calorimetry. Tensile tests have shown that the ultimate tensile strengths of the joints reached almost 100% of that of the base material. An additional heat treatment rebuilt the typical shape memory alloy behavior after the ultrasonic welding process detwinned the martensitic wires. In addition, the B19′ structure of the welding zone and the ultrasonic spot-welding process did not affect the transition temperatures of the shape memory alloy.https://www.mdpi.com/2075-4701/11/12/1936ultrasonic metal weldingshape memory alloysmechanical and microstructural propertiestransition temperature |
| spellingShingle | Toni Sprigode Andreas Gester Guntram Wagner Thomas Mäder Björn Senf Welf-Guntram Drossel Mechanical and Microstructural Characterization of Ultrasonic Welded NiTiCu Shape Memory Alloy Wires to Silver-Coated Copper Ferrules Metals ultrasonic metal welding shape memory alloys mechanical and microstructural properties transition temperature |
| title | Mechanical and Microstructural Characterization of Ultrasonic Welded NiTiCu Shape Memory Alloy Wires to Silver-Coated Copper Ferrules |
| title_full | Mechanical and Microstructural Characterization of Ultrasonic Welded NiTiCu Shape Memory Alloy Wires to Silver-Coated Copper Ferrules |
| title_fullStr | Mechanical and Microstructural Characterization of Ultrasonic Welded NiTiCu Shape Memory Alloy Wires to Silver-Coated Copper Ferrules |
| title_full_unstemmed | Mechanical and Microstructural Characterization of Ultrasonic Welded NiTiCu Shape Memory Alloy Wires to Silver-Coated Copper Ferrules |
| title_short | Mechanical and Microstructural Characterization of Ultrasonic Welded NiTiCu Shape Memory Alloy Wires to Silver-Coated Copper Ferrules |
| title_sort | mechanical and microstructural characterization of ultrasonic welded niticu shape memory alloy wires to silver coated copper ferrules |
| topic | ultrasonic metal welding shape memory alloys mechanical and microstructural properties transition temperature |
| url | https://www.mdpi.com/2075-4701/11/12/1936 |
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