Resistencia a la tracción y microdureza en función del tamaño y tipo de estructura de aleaciones ZA1 Hipoeutécticas y ZA5 Eutécticas
Among the mechanical properties dependent on the microstructure of the material, can be mention the limit of tensile strength, elongation, tenacity, resistance to fatigue, creep resistance, corrosion resistance and abrasion as well as thermal and electrical conductivities. For Metallurgical Industry...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2010 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | español |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/80054 |
| Acceso en línea: | http://hdl.handle.net/11336/80054 |
| Access Level: | acceso abierto |
| Palabra clave: | Aleaciones Zn-Al hipoeutécticas y eutécticas parámetros estructurales resistencia a la tracción microdureza |
| Sumario: | Among the mechanical properties dependent on the microstructure of the material, can be mention the limit of tensile strength, elongation, tenacity, resistance to fatigue, creep resistance, corrosion resistance and abrasion as well as thermal and electrical conductivities. For Metallurgical Industry it is important to identify expressions correlating mechanical properties with structural parameters utilizing metal systems of industrial interest, such as zinc-aluminum alloys (ZA). Thus, dendritic spacings dependent on thermal conditions during the solidification process will have a close relationship with the thermal parameters and mechanical properties evaluation. This paper analyzes the variation of the obtained parameters from tensile tests according to the concentration of the alloy (Zn-1wt%Al and Zn-5wt%Al) and the type and size of structure obtained during directional solidification. The grain size, gs , in columnar, equiaxed and columnar to equiaxed transition (CET) zones was measured. Also, the sizes of the secondary dendritic spacing, λ2 , on the fracture zones of the tested samples were determined. The mechanical parameters determined are Vickers Microhardness (HV) and the parameters obtained from tensile tests, which are maximum tensile strength (TS) yield strength (YS), and ultimate tensile strength (UTS) of the material. Preliminary results indicate that the eutectic alloys (Zn-5wt%Al) are more resistant than hypoeutectic alloys (Zn-1wt%Al). The dependence of the mechanical properties with the type and size of grains and dendritic and eutectic spacings in both alloy systems it presents and analyzes. |
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