Mechanical and fatigue strength assessment of friction stir welded plates of magnesium Alloy AZ31B
Light-alloys play a significant role in saving weight in automotive and aerospace industries; however, a few joining methods guarantee mechanical and fatigue strengths for high performance application. Even conventional arc welding processes do not offer constant quality joints. Therefore, this stud...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/368122 |
| Acceso en línea: | https://hdl.handle.net/2117/368122 https://dx.doi.org/10.1590/0104-9224/si2301.06 |
| Access Level: | acceso abierto |
| Palabra clave: | Metals--Fatigue Magnesium AZ31B Fatigue strength Tensile strength Friction stir welding FSW Metalls--Fatiga Àrees temàtiques de la UPC::Enginyeria dels materials |
| Sumario: | Light-alloys play a significant role in saving weight in automotive and aerospace industries; however, a few joining methods guarantee mechanical and fatigue strengths for high performance application. Even conventional arc welding processes do not offer constant quality joints. Therefore, this study uses an alternative solid-state welding process, friction stir welding (FSW), to analyze post processing microstructures and assess mechanical and fatigue strength. Magnesium alloy AZ31B plates were welded using different welding parameters in a dedicated FSW machine. The effect of the spindle speed (¿) and welding speed (¿) on the microstructure, the tensile strength and fatigue were studied. The stirred zone (SZ) at the FS-welded joints presented a microstructure composed by homogeneous equiaxial grains, refined by dynamic recrystallization. A rise in grain size, weld bead width, tensile and fatigue strengths with the increase of speed ratio (¿/¿) were observed. Results of the fatigue and mechanical strength here presented outperformed results from welds made with conventional milling machines. |
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