Investigation of Through-Thickness Residual Stress, Microstructure and Texture in Radial Forged High-Strength Alloy Steel Tubes

Gradient variations of through-thickness residual stress, microstructure and texture greatly affect the performance cold radial forged tubes. In this work, distribution stress was measured based on Debye ring. The characterized with electron backscattering diffraction technique. by X-ray diffractometer. influence strength anisotropy tubes different thickness reductions analyzed. results show that varies gradually from compressive to tensile outer inner surface. microhardness surface is lower than inner. dislocation density low-angle grain boundary fraction are smallest in one-third thickness. increase main components tube include {111}<110>, {001}<110> {114}<110>. Texture {111}<110> deflects toward {114}<110>, {112}<110> {110}<110> external internal tube. gradient variation mainly resulted difference density. along direction reduced a larger reduction. This work has important significance for improving high-strength alloy steel processed forging.