Stress-Strain Characteristics and Electrical Conductivity of Niobium Nanopowder modified Silicon Bronze

Kingsley C Nnakwo*, Jeremiah L Chukwuneke, Paul C Okolie, Chika O Ujah and Maxwell C Anukwonke

Understanding the response of materials to various loads is crucial for fabricating resilient components capable of withstanding anticipated stresses. This experimental study addresses the limited information on the tensile behavior of silicon bronze by investigating the stress-strain characteristics of Cu-4wt%Si alloys modified with niobium nanopowder. The surface morphology of the fabricated alloys was analyzed using a Scanning Electron Microscope (SEM). SEM analysis of the Cu-4wt%Si alloy revealed columnar grains sparsely distributed in the copper matrix, contributing to low strain-to-fracture behavior. Doping the alloy with niobium nanopowder resulted in notable grain modification, increased grain boundary density, and improved grain distribution, correlating with higher strain-to-fracture values. Notably, the Cu-4wt%Si-1.1wt%Nb alloy exhibited significant changes in percentage elongation, ultimate tensile strength, yield strength, fracture strength, and tensile toughness. Furthermore, niobium nanopowder additions increase the hardness and electrical conductivity values, peaking at 305 HV and 54.9 %IACS with 1.1 wt% Nb.

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Published on: Jul 26, 2024 Pages: 11-15

Full Text PDF Full Text HTML DOI: 10.17352/gjbbs.000022
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