Experimental Investigation of Micro Scratching on the Two-Phase Steel: Plastic Flow Mechanisms of the Ferrite and Cementite Phases

摘要

In order to produce micromachined parts with greater dimensional accuracy, it is important to clarify the influence of heterogeneity and/or discontinuity of workpiece materials in the micromachining process because almost all structural materials are composed of heterogeneous and/or homogeneous crystal grains from the microscopic viewpoint. Experiments where the JIS S25C steel had been scratched with a diamond triangular pyramid indenter were conducted under a field emission scanning electron microscope (FE-SEM). The difference in plastic flow of a scratch groove between a pearlite zone and a ferrite zone was clarified through comparison of the scratch grooves of those zones.