Influence of chemical composition on the conductivity and on some mechanical properties of Mg-doped Cu-Si alloy

Journal of King Saud University: Engineering Sciences

卷:32

Christopher N. Mbah¹  Sabina N. Ude²  Kingsley C. Nnakwo² 

[1] Corresponding author.;

[2] Department of Metallurgical and Materials Engineering, Enugu State University of Science and Technology, P. M. B 01660, Agbani, Nigeria;

关键词: Magnesium;    Silicon;    Strength;    Ductility;    Conductivity;    Grains;   

DOI  :  

来源: DOAJ

【 摘 要 】

This study discussed the influence of chemical composition on the conductivity and on some mechanical properties of Mg-doped Cu-Si alloy. The structural changes accompanying variations of the alloy chemical composition was investigated using Carl ZEISS Scanning Electron Microscope (SEM) (EVO/NA10) and Energy Dispersive Spectroscopy (EDS). The study also discussed the implication of structural changes on the electromechanical behavior. The results obtained were analyzed statistically using one-factor response surface method (RSM-Design Expert software) to evaluate the level of significance of magnesium addition on Cu-3Si-Mg ternary alloy properties. The SEM results revealed fine grains in the Mg-doped Cu-3Si alloy. The study recorded improvement of properties: average ductility of 25.1%, UTS of 285 MPa; hardness of 318 BHN and average electrical conductivity of 53.9% IACS. The statistical analysis indicated that magnesium significantly improved all the tested properties haven recorded P-values < 0.05. The result of optimization revealed Cu-3Si-0.837 Mg as the optimal composition.

【 授权许可】

Unknown