Fractography study of Co-Cr-Ni-Mo alloy fatigue wires drawn with different drawing practices

摘要

This study investigates the influence of wire drawing practices, namely Full Die Drawing (FDD) and Half Die Drawing (HDD) on the fatigue performance of MP35NLT wires. The as-drawn wires were subjected to rotary beam fatigue tests with varying stress amplitudes, and the cyclic performance of the wires in the LCF and HCF regimes was determined. A relation between the microscopic and macroscopic attributes contributing to different crack mechanisms was established. The results conclude that there is a significant impact on the drawing techniques on the cyclic performance, with the FDD wires having a higher endurance limit than the HDD wire.