Abstract
The feed per tooth fz for slab-milling was varied to observe effects of the density dz (=1/fz) of cutting edges acting on machined surface in unit length. As the dz is increased, macroscopic residual stresses σxv and σyv translate into a compressive stress and microscopic residual shear stress τzxw decreases. Decreasing dz results in growing fiber texture in a machined layer and the principal slip planes α·Fe {110} in medium carbon steel concentrate along a direction inclined to the machined surface. The microscopic τzxw is generated by the slip on the planes. The effects of dz, on τzxw for up-milling are stronger than for down-milling. The effects of dz appears also in a carbide phase in high speed steel.
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