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}; {001} were formed. Copper (middle SFE), along with orientations of twinning and cubic texture formed orientation of deformation {135}. 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
Highlights
Most of the modern technologies for processing sheet metal include mechanical and thermal treatment, which inevitably results in the generation of internal stresses in the material and warping of the resulting parts
Alternating bending shear stresses lead to the formation of twin orientations in the texture of face-centered cubic (FCC) materials with middle and low stacking fault energy (SFE)
The crystallographic texture was investigated by recording inverse pole figures (IPFs) in the normal direction (ND) and rolling directions (RD) using a DRON-3 m diffractometer in the filtered Mo Kα radiation on both surfaces of the samples after the abovementioned numbers of the cycles and after 0.25 cycle
Summary
Most of the modern technologies for processing sheet metal include mechanical and thermal treatment, which inevitably results in the generation of internal stresses in the material and warping of the resulting parts. In the course of straightening, the material is subjected to alternating bending (AB), which ensures good planeness. This treatment minimizes the level of internal residual stresses in the metal and provides necessary planar characteristics, which significantly facilitates the subsequent metal processing and positively affects the quality of finished products. As a result of plastic deformation in the process of straightening, there, occurs a change in the metal texture and microstructure. Mechanisms of metal texture and microstructure formation during the alternating bending, undoubtedly, are due to the stacking fault energy (SFE) value
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