Estudio de la microestructura-propiedad en la soldadura por fricción de aluminio-acero
With the increase of the environmental problems, a way to reduce the emissions of greenhouse gases is investigated, a sector that contributes to this contamination is the transport means. The strict governmental politics demand a solution for the problem and poses that if structure of automotive wei...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | México |
| Institución: | Universidad Autónoma de Zacatecas |
| Repositorio: | Repositorio Institucional Caxcán |
| Idioma: | español |
| OAI Identifier: | oai:http://ricaxcan.uaz.edu.mx:20.500.11845/2579 |
| Acceso en línea: | http://ricaxcan.uaz.edu.mx/jspui/handle/20.500.11845/2579 |
| Access Level: | acceso abierto |
| Palabra clave: | INGENIERIA Y TECNOLOGIA [7] Friction Stir Spot Welding dissimilar mechanical properties |
| Sumario: | With the increase of the environmental problems, a way to reduce the emissions of greenhouse gases is investigated, a sector that contributes to this contamination is the transport means. The strict governmental politics demand a solution for the problem and poses that if structure of automotive weights and the other transport means are reduced, the fuels will have a better performance and so will be a diminish of emissions. To reach this target has been proposed the replacement of structural elements of conventional steels for sheets of Advanced High Strength Steel (AHSS) and sheets of light alloys like aluminum, magnesium and titanium. However, the welding between steels and no ferrous alloys imposes a challenge because of the difference in their physical, chemical, and mechanical properties. A trend to achieve the Welding between dissimilar materials is the Friction Stir Spot Welding (FSSW), a type of welding in solid - state. In the present investigation “Study of microstructure - property in the friction welding of aluminum-steel” the process of FSSW welding between AA6063-T6- and DP780 steel has been parametrized, also the tool for the welding was designed and manufactured. Welding by FSSW was realized at different percentages of shoulders tool penetration (50, 60, 70, 80, 90%) keeping the other process parameters constant (rotational frequency, dwell time, plunge rate). Analyses of the macro and microstructure, as well as the evaluation of the mechanical properties of microhardness and loading capacity were made. The zones proper of this kind of Welding for each one of the specimens analyzed were identified showing consistency between the microstructure independently of the penetrations varying only the extension of the zones, the results of the microhardness measurements indicate that the material suffered softening during the process with respect to the base metal and with the results of the loading capacity it was determined that the weldings with the highest resistance were the realized at 70% of penetration. |
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