The effect of elevated temperatures on the properties of cold-drawn steel fibres

Abstract

This study aims to evaluate the effect of elevated temperatures on the physical, mechanical and microstructural properties of a hooked-end steel fibre for temperatures of 100, 350, 750 and 1000°C. Results show that an oxidation layer is formed on the surface of the fibres exposed to temperatures of 750°C and above, which leads to an increase in external diameter and mass. Reductions in tensile strength are directly proportional to the temperature increase, while rupture strain values significantly increase for temperatures above the recrystallisation temperature of steel. This study contributes to the understanding of the contribution of steel fibres to the overall behaviour of the composite after temperature exposure and serves as an input for recently developed numerical models.