Evaluation of hardening and softening behaviors in Znâ21Alâ2Cu alloy processed by equal channel angular pressing
| Autor: | Jorge García Rocha, Emmanuel Ramírez Contreras, J.L. Hernández-Rivera, G. Torres-Villaseñor, J.J. Cruz-Rivera, Esperanza Elizabeth Martínez Flores |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
lcsh:TN1-997
Materials science Annealing (metallurgy) 020502 materials Metallurgy Alloy Metals and Alloys 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure Indentation hardness Homogenization (chemistry) Surfaces Coatings and Films Biomaterials 0205 materials engineering Ceramics and Composites engineering Hardening (metallurgy) Severe plastic deformation 0210 nano-technology Softening lcsh:Mining engineering. Metallurgy |
| Zdroj: | Journal of Materials Research and Technology, Vol 6, Iss 4, Pp 329-333 (2017) |
| ISSN: | 2238-7854 |
| Popis: | The microstructural evolution of as-cast and homogenized Znâ21Alâ2Cu samples after two and six passes in an equal channel angular pressing (ECAP) at room temperature was reported. A homogenization treatment for 24 h at 350 °C was applied to the as-cast samples followed by deformation. An annealing heat treatment was performed on all samples after the ECAP process. Our results showed that the homogenized and deformed samples displayed a uniform fine-grained microstructure after annealing, while as-cast samples without homogenization treatment presented only some regions of fine-grained microstructure. The level of microsegregation was higher in the as-cast samples as compared to the homogenized ones even after annealing. Vickers microhardness measurement on samples after deformation is smaller than the original material indicating a softening. However, after the annealing treatment, the microhardness increased, indicating that there was a slight hardening of the material. Keywords: Severe plastic deformation, ECAP, Work softening, Annealing, Hardening, Fine grain |
| Databáze: | OpenAIRE |
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