Effects of Zn content on surface deformability and corrosion resistance of MgZnMnCa alloys
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Márcio Teodoro Fernandes
Abstract
The effects of the Zn content on the mechanical and corrosion properties of MgZnMnCa alloys were investigated. The results revealed that with increasing Zn content up to 4 wt.%, the Mg-4Zn-0.2Mn-0.2Ca (wt.%) alloy after solution treatment at 400°C for 24 h (ZM40-S) exhibited a volume fraction of 1.56 ± 0.05 (vol.%) of secondary phases with an average grain size of 83.6 ± 1.6 µm. This alloy in the at-cast condition exhibited indentation hardness (Hit) of 657.1 ± 17.8 MPa, which increased to 723.5 ± 29.8 MPa after solution treatments. In addition, the alloy also exhibited a Vickers hardness value of 66.8 ± 2.7 HV and an elastic modulus of 33.8 ± 0.6 GPa, close to the values for human bone. Further, the corrosion properties of this alloy were analyzed: it exhibited a cathodic polarization curve attributed to a hydrogen evolution reaction and an anodic curve corresponding to a passivation tendency, indicating the formation of an oxide layer at the surface; further, its corrosion rate was 0.23 mm/year.
© 2020 by Walter de Gruyter Berlin/Boston
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- Notifications
- Erratum
- DGM
- CONFERENCES
- Imprint
Articles in the same Issue
- CONTENTS
- Original Contributions
- Accurate estimation of DLC thin film hardness using genetic programming
- Effects of graphene on the microstructure and properties of MAO coatings formed on AA7050
- Influence of nanostructured Cu on the mechanical properties of Cu–MWCNTs composites
- Effect of NbC on the microstructure, mechanical properties, and oxidation resistance of Ti(C,N)-based cermets
- Evolution of microstructure and wear-friction behavior of W-30 wt.% Cu nanocomposite produced via a mechanochemical synthesis route
- Comparison of the strengthening effects of Nb, V, and Ti on the mechanical properties of 20MnSi low-alloy steel
- Effects of Zn content on surface deformability and corrosion resistance of MgZnMnCa alloys
- Experimental investigation on low cycle fatigue properties of Ni-based alloy with single hole
- Phase relationships in the Ce–Nd–B system at 773 K
- Notifications
- Erratum
- DGM
- CONFERENCES
- Imprint
