Direct correlation between strengthening mechanisms and electrical noise in strained copper wires

TL;DR

This study investigates how different strengthening mechanisms in copper wires influence electrical noise during tensile stress, revealing correlations between material properties and noise behavior.

Contribution

It provides the first direct correlation between strengthening mechanisms and electrical noise spectra in strained copper wires.

Findings

Resistance noise increases with tensile stress.

Fluctuations indicate heterogeneous plastic flow.

Strengthening mechanisms affect noise spectral features.

Abstract

We have measured the resistance noise of copper metallic wires during a tensile stress. The time variation of the main resistance is continuous up to the wire breakdown, but its fluctuations reveal the intermittent and heterogeneous character of plastic flow. We show in particular direct correlations between strengthening mechanisms and noise spectra characteristics.