Evaluation of the interface of Eucalyptus specimens welded by rotary friction
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad del Bío Bío
2023
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| _version_ | 1876474382836039680 |
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| author | Ana Carolina Costa Viana |
| author_facet | Ana Carolina Costa Viana |
| contents | Evaluation of the interface of Eucalyptus specimens welded by rotary friction Ana Carolina Costa Viana Poliana Dias de Moraes Walter Lindolfo Weingaertner Agrociencias Eucalypts wood rotary friction welding of wood Dowel connections thermochemical changes Rotary friction welding produces joints by inserting wood dowels, with a specific rotation and feed rate, into pre-drilled holes made in wood substrates. Studies on the welding of fast-growing Eucalypts from Brazilian planted forests are recent. Therefore, this research aimed to evaluate the macro and microstructural and thermochemical changes at the dowel/substrate interface of Eucalypts welded joints from Brazilian planted forests and to determine the mechanical strength of two-piece Eucalypts welded joints. Specimens formed by eucalypts dowels and substrates were produced. Subsequently, visual evaluation and scanning electron microscopy, attenuated total reflectance-Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric, differential scanning calorimetry and tensile tests were performed. The results reveal that the rotary friction welding parameters adopted contribute to the densification of the welded interface and the formation of a structure responsible for joining the dowel and the substrate, providing mechanical strength to the joint. The cellulose crystallinity index and the apparent crystallite size of the Eucalypts welded sample increase due to thermal degradation of amorphous components. The rupture of the welded joints is ductile and their average strength is 2,1 MPa. Welded joints of fast-growing Eucalypts, from Brazilian planted forests, are suitable when the rotary friction welding parameters are similar to those used for Eucalypts woods from Australian forests. 2023 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48575202026 https://www.redalyc.org/journal/485/48575202026/ https://www.redalyc.org/journal/485/48575202026/html/ https://www.redalyc.org/journal/485/48575202026/48575202026.epub https://www.redalyc.org/journal/485/48575202026/movil 10.4067/s0718-221x2023000100426 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Vol.25 |
| format | Artículo científico |
| id | redalyc_48575202026 |
| institution | Redalyc |
| language | en |
| publishDate | 2023 |
| publisher | Universidad del Bío Bío |
| spellingShingle | Evaluation of the interface of Eucalyptus specimens welded by rotary friction Ana Carolina Costa Viana Agrociencias Eucalypts wood rotary friction welding of wood Dowel connections thermochemical changes Evaluation of the interface of Eucalyptus specimens welded by rotary friction Ana Carolina Costa Viana Poliana Dias de Moraes Walter Lindolfo Weingaertner Agrociencias Eucalypts wood rotary friction welding of wood Dowel connections thermochemical changes Rotary friction welding produces joints by inserting wood dowels, with a specific rotation and feed rate, into pre-drilled holes made in wood substrates. Studies on the welding of fast-growing Eucalypts from Brazilian planted forests are recent. Therefore, this research aimed to evaluate the macro and microstructural and thermochemical changes at the dowel/substrate interface of Eucalypts welded joints from Brazilian planted forests and to determine the mechanical strength of two-piece Eucalypts welded joints. Specimens formed by eucalypts dowels and substrates were produced. Subsequently, visual evaluation and scanning electron microscopy, attenuated total reflectance-Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric, differential scanning calorimetry and tensile tests were performed. The results reveal that the rotary friction welding parameters adopted contribute to the densification of the welded interface and the formation of a structure responsible for joining the dowel and the substrate, providing mechanical strength to the joint. The cellulose crystallinity index and the apparent crystallite size of the Eucalypts welded sample increase due to thermal degradation of amorphous components. The rupture of the welded joints is ductile and their average strength is 2,1 MPa. Welded joints of fast-growing Eucalypts, from Brazilian planted forests, are suitable when the rotary friction welding parameters are similar to those used for Eucalypts woods from Australian forests. 2023 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48575202026 https://www.redalyc.org/journal/485/48575202026/ https://www.redalyc.org/journal/485/48575202026/html/ https://www.redalyc.org/journal/485/48575202026/48575202026.epub https://www.redalyc.org/journal/485/48575202026/movil 10.4067/s0718-221x2023000100426 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Vol.25 |
| title | Evaluation of the interface of Eucalyptus specimens welded by rotary friction |
| topic | Agrociencias Eucalypts wood rotary friction welding of wood Dowel connections thermochemical changes |
| url | https://www.redalyc.org/articulo.oa?id=48575202026 https://www.redalyc.org/journal/485/48575202026/ https://www.redalyc.org/journal/485/48575202026/html/ https://www.redalyc.org/journal/485/48575202026/48575202026.epub https://www.redalyc.org/journal/485/48575202026/movil |