Evolution of Microstructure and Fe/Fe3C Interface Structure in Cold‐Drawn Pearlitic Steel Wires

• DOI: 10.1002/srin.202300556
• Publication Date: 2024-01-04T10:29:00Z
• Authors: Xu Yang; Siqian Bao; Xiaolong Kang; Jiarui Hu; Chen Liu; Renmin Tian
• Keywords: 0203 mechanical engineering; 02 engineering and technology

The microstructure, texture, and dislocation configuration of cold‐drawn pearlitic steel wires were investigated by scanning electron microscopy (SEM), backscattering diffraction (EBSD), transmission (TEM). In addition, Fe/Fe 3 C interface structure at the atomic level was clearly observed analyzed high‐resolution TEM (HRTEM), microscopic deformation mechanism cementite lamellae different drawing strains is revealed. results show that pearlite turn to direction form ferrite <110> fiber are simultaneously thinned with increase strain. During cold process, shear‐bands(S‐bands) formed in lamellae; transits from single slip multi‐slip stage, density increases. After drawing, lattice structures phases evolution single‐crystal polycrystal, divided into a multilayer structure: central relative large‐size crystal outside small‐size layer; dissolution some regions expansion phase occurrence neck‐down lamellae.