Effect of deformation temperature on the microstructure and texture evolution in copper during tension

N.Y. Zolotorevsky ORCID logo , V.V. Rybin, E.A. Ushanova, V.N. Perevezentsev show affiliations and emails
Received: 16 August 2023; Revised: 13 September 2023; Accepted: 20 September 2023
Citation: N.Y. Zolotorevsky, V.V. Rybin, E.A. Ushanova, V.N. Perevezentsev. Effect of deformation temperature on the microstructure and texture evolution in copper during tension. Lett. Mater., 2023, 13(4) 362-367
BibTex   https://doi.org/10.22226/2410-3535-2023-4-362-367

Abstract

The inter-fragment boundary misorientation distributions are close at two temperatures of deformation, except for the high-angle peak associated with the twinning at 0.5Tm (Tm is the melting temperature of copper).Electron backscatter diffraction (EBSD) has been used to study the patterns of grain fragmentation during tensile deformation of copper. The microstructure was examined within the neck region of specimens deformed at temperatures approximately equal to 0.2Tm and 0.5Tm. The misorientations at geometrically necessary boundaries demonstrate the scaling behavior, which suggests that the physical mechanism of grain fragmentation is unchanged over the strains and temperatures examined in the present study. In addition to the dominant cell block structure, regions, where highly misoriented fine fragments and dynamically recrystallized grains are concentrated, have been observed. The distributions of misorientation angles between those fragments / grains are similar for two temperatures, except for the high-angle peak associated with the twinning, which accompanies dynamic recrystallization at 0.5Tm. The difference in crystallographic textures developed at two temperatures was suggested to be caused by the growth of [100] grains at the expense of their more work-hardened [111] neighbors under the conditions of warm deformation.

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Funding

1. Russian Science Foundation - project # 21-19-00366