Influence of chromium on the structure and physic-mechanical properties of Cu-3wt%Si alloys

Authors

  • Onyia, C. W Department of Metallurgical and Materials Engineering, Enugu State University of Science and Technology, Enugu
  • Nnuka, E. E Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka.
  • Nwambu, C. N Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka.

Keywords:

Chromium, Copper, Silicon, Structure, physic-mechanical properties.

Abstract

The structure and physico-mechanical properties of Cu-3wt%Si alloys produced by permanent mould technique were investigated in order to determine the effect of trace quantity of chromium on the microstructure and physico-mechanical properties. These research objectives were accomplished using tensile, hardness and electrical conductivity/resistivity tests. Optical microscopy was used to analyze the microstructure of the cast samples. The results showed that addition of chromium to Cu-3wt%Si alloy refined and modified the structure of the alloy and consequently improved the physico-mechanical properties. The observed maximum ultimate tensile strength, yield strength and hardness values were 316 MPa, 238 MPa and 85 HRB at 1.5wt%Cr content respectively while maximum percentage elongation value of 28.2% at 0.1wt%Cr content was observed. Maximum electrical conductivity (28.62 S/m) and minimum electrical resistivity (34.94x10-3Ωm) were obtained at 0.1wt%Cr content.

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Published

2024-01-05

Issue

Vol. 3 No. 1 (2024): UNIZIK Journal of Engineering and Applied Sciences

Section

Articles