Processing of Zn-3Mg alloy by equal channel angular pressing for biodegradable metal implants
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Zn-based alloys have been studied as new biodegradable metals owing to its slower corrosion rate compared to Mg-based alloys and its high potential for mechanical properties improvement. The present work attempts to improve mainly the mechanical properties of a eutectic Zn-3Mg alloy via equal channels angular pressing (ECAP). Cast Zn-3Mg alloy was homogenized at 370 Â°C for 15 h and quenched in water before subjected to 2 steps ECAP process. Results showed that the process decreases the alloy's grain size from 48 Âµm in the as cast to 1.8 Âµm after 2-passes of ECAP. A remarkably increase of yield strength, tensile strength and elongation was achieved from 65 MPa, 84 MPa and 1.3% (as cast) to 205 MPa, 220 MPa and 6.3% (2-ECAP), respectively. Corrosion rate of the alloy was fairly altered from 0.30 mm/year (as cast) to 0.24 mm/year (2-ECAP). The combination of homogenization and ECAP is therefore viewed as a potential process to improve mechanical properties of Zn-Mg alloys.
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Influence of thermal treatment on microstructure, mechanical and degradation properties of Zn-3Mg alloy as potential biodegradable implant materialDambatta, M.; Izman, S.; Kurniawan, Denni; Farahany, S.; Yahaya, B.; Hermawan, H. (2015)© 2015 Elsevier Ltd. In this study, the influence of homogenisation heat treatment effect on Zn-3Mg alloy proposed for biodegradable bone implants was investigated. The alloy was developed via casting process from high ...
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