Effect of nickel addition on microstructure, tensile and corrosion properties of cold rolled silicon bronze
| Autor: | Oluwasegun Eso Falodun, Peter Apata Olubambi, Samuel Ranti Oke, A.O. Asaolu, J.A. Omotoyinbo |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Metallurgy Alloy chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Indentation hardness Corrosion Nickel chemistry 0103 physical sciences Ultimate tensile strength engineering Grain boundary Bronze 0210 nano-technology |
| Zdroj: | Materials Today: Proceedings. 38:1147-1151 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2020.07.136 |
| Popis: | In this study, silicon bronze (Cu-Si) with nickel addition was fabricated using double stir casting technique. The influence of nickel addition and cold deformation on the microstructure, hardness, tensile and corrosion properties of the fabricated alloys were investigated. The microstructure of the alloy was evaluated using an optical microscope. Microhardness tester was used to determine the hardness while the tensile property was obtained from the hardness data. Potentiodynamic polarization measurement was used to study corrosion behaviour in 0.5 M H2SO4. The result show that the Ni modified Cu-Si alloys revealed the presence of Cu rich α-phase and δ-Ni2Si precipitates along the α grain boundaries. The δ-Ni2Si precipitates increased with increase in Ni content. The addition of Ni reduces the grain sizes and refine the microstructure. The hardness and tensile strength of the Ni modified Cu-Si increased with an increase in Ni addition from 0.2 to 0.8 wt%. The silicon bronze showed excellent corrosion resistance in a sulfuric acid environment with Ni addition. This is evident from the reduction in corrosion current density (Icorr) with an increase in Ni content. |
| Databáze: | OpenAIRE |
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