Surface-Grinding-Induced Recrystallization and Metal Flow Causes Corrosion-Assisted Penetrating Attack of High-Mn-Low-CR Casting Steel in Humid Environments.

ABSTRACT: This study examined the surface-grinding-induced microstructural modifications and corrosion attacks in a penetrating form of a high-Mn-low-Cr casting steel slab under humid environments. Various experimental and analytical findings from field-emission scanning electron microscopy, electron backscatter diffraction, transmission electron microscopy, and electrochemical analyses revealed that the abrasive grinding process led to the formation of a surface deformed region, comprising a recrystallized fine grain layer and multiple streamlines. Corrosion initially occurs preferentially along the boundary areas where Cr(Mn)₂₃C₆ particles are precipitated. Moreover, the corrosion products (Fe-based oxy/hydroxides) with a high volumetric expansion ratio detach readily from th

SUBMITTER: Park JS 

PROVIDER: S-EPMC11643921 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature