Effect of Stacking Fault Energy on the Mechanism of Texture Formation during Alternating Bending of FCC Metals and Alloys

Abstract

Alternating bending shear stresses lead to the formation of twin orientations in the texture of FCC materials with middle and low stacking fault energy (SFE). Only in the stainless steel with a low SFE during alternating bending with different number of cycles components of shear texture {111}<hkl>; {hkl}<110>; {001}<110> were formed. Copper (middle SFE), along with orientations of twinning and cubic texture formed orientation of deformation {135}<211>. During alternating bending of aluminum (high SFE), a dynamic recovery occurred. The share of initial cubic texture increases with the increase of number of cycles of alternating bending and reaches its maximum after three cycles. Share of component of texture Goss increased slightly. The most significant change of the microstructure and texture occurred during the first 3 -5 cycles

Dynamic recrystallization mechanisms and twining evolution during hot deformation of Inconel 718

“…1. The presence of equiaxed grains and annealing twins shows that the initial material has a recrystallized structure [41,42]. The average grain size (without twins) was measured to be about 45 μm by the linear intercept method.…”

“…A simplified theoretical analysis of the barrel compression test for estimation of the friction factor was used to remove the friction effects. Details of this method can be found elsewhere [41,43]. The samples for EBSD evaluation were ground with SiC papers, mechanically polished with diamond paste, and then polished with 0.04 µm colloidal silica solution for one hour.…”