• Chidume Nnamdi Nwambu
• Okelekwe Ngozi
• Nnuka Eugene

This research investigated the correlation of the structure, mechanical, and physical properties of Cu-4wt%Mg-xwt%Co alloy. The effect of cobalt content on the structure, mechanical, and physical properties of Cu-4wt%Mg-xwt%Co alloy was also investigated. Cobalt was added in concentrations of 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0wt%. The samples were developed using a permanent die-casting technique and machined to the required dimensions for the structural analysis, physical and mechanical tests. Mechanical properties such as percentage elongation, ultimate tensile strength, and hardness of the developed alloy were investigated using a 100KN JPL tensile strength tester (Model: 130812) and portable dynamic hardness testing machine (Model: DHT-6) respectively. The physical properties such as electrical resistivity and conductivity were also determined using standard Ohm’s experiment. The structural analysis was conducted using an optical metallurgical microscope (Model: L2003A) and scanning electron microscopy (SEM). The microstructural analysis of the control sample (Cu-4wt%Mg) revealed the presence of coarse magnesium intermetallic phase (Cu-4Mg). The surface morphology of the doped alloy consisted of refined and modified intermetallic phases evenly dispersed in the alloy structure. The mechanical test results showed that the percentage elongation, ultimate tensile strength, and hardness of the alloy increased significantly with the addition of cobalt. The ultimate tensile strength and hardness of the alloy increased with an increase in cobalt content with a corresponding decrease in percentage elongation. It was also observed that the electrical resistivity of the alloy increased with a corresponding decrease in electrical conductivity by the addition of 0.1wt% of cobalt. Results obtained also showed that the ultimate tensile strength and hardness correlate with electrical resistivity while the percentage elongation correlates with electrical conductivity. This was concluded to be a result of grain refinement of the alloy structure by cobalt addition which caused the scattering of electrons, hence increasing the electrical resistivity with a corresponding decrease in electrical conductivity of the alloy.

Electron scattering, mechanical properties, physical properties, Magnesium bronze; grains.

"Correlation of the Structure, Mechanical, and Physical Properties of Cu-4wt%Mg-xwt%Co Alloy", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 4, page no.c661-c670, April-2024, Available :http://www.jetir.org/papers/JETIR2404273.pdf

"Correlation of the Structure, Mechanical, and Physical Properties of Cu-4wt%Mg-xwt%Co Alloy", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 4, page no. ppc661-c670, April-2024, Available at : http://www.jetir.org/papers/JETIR2404273.pdf