Subsurface Microstructural Evolution during Scratch Testing on Bcc Iron

Subsurface microstructures influence the friction and wear behavior of metallic tribological systems, among other factors. To gain a basic understanding microstructural changes occurring during sliding processes, face-centered cubic model for example copper system with sapphire sphere against it, were previously characterized. Such systems showed evolution dislocation self-organization phenomenon called trace line. test occurrence this arrangement in bcc metals, study ruby ball was slid electropolished iron under an increasing normal load. The track topography subsurface microstructure characterized using white light interferometry scanning transmission electron microscopy. analysis suggested that at least iron, line is connected onset pronounced plastic deformation.