Effect of Deformation Temperature on Texture Evolution in Hot-extruded Copper

LI Longhao; LIU Haolan; HU Hao; LI Xiyao; WANG Jiangwei; SONG Kexing

doi:10.3969/j.issn.1674-6457.2026.09.016

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Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (9) : 159-167. DOI: 10.3969/j.issn.1674-6457.2026.09.016

Copper Alloy Forming

Effect of Deformation Temperature on Texture Evolution in Hot-extruded Copper

LI Longhao^1,2, LIU Haolan^1,*, HU Hao², LI Xiyao¹, WANG Jiangwei¹, SONG Kexing¹

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Abstract

The work aims to systematically analyze the mechanisms by which temperature influences texture evolution and macroscopic mechanical properties of hot-extruded high-purity copper during deformation, so as to provide new insights for understanding texture evolution and property optimization under thermo-mechanical coupling environments. In-situ tensile experiments were conducted on hot-extruded pure copper at both room temperature and elevated temperature using in-situ electron backscatter diffraction (EBSD) to correlate microstructural evolution with the macroscopic mechanical behavior. Temperature significantly influenced the texture evolution pathway, with a distinct divergence observed particularly within the 6%-15% plastic strain interval. During room temperature deformation, grains tend to rotated towards soft orientations, resulting in a significant increase in the fraction of <100> soft texture (//LD) and consequently exhibiting relatively lower yield and tensile strengths. In contrast, elevated temperature conditions suppressed the transition towards the <100> soft texture and instead promoted a significant increase in the proportion of <111> and <112> hard textures. This accumulation contributed to an extra work hardening, enhancing the ultimate tensile strength by 79.1 MPa while concurrently increasing ductility. It is concluded that high temperature alters the underlying dislocation dynamics, thereby modifying grain rotation paths to favor the formation of <111> and <112> hard textures, which enhances material strength. Furthermore, the synergistic effect of dynamic recovery and the reduction in the densities of low-angle grain boundaries (LAGBs) and geometrically necessary dislocations (GNDs) effectively weaken the local stress concentrations, thereby enhancing the plasticity.

Key words

high-purity copper / hot-extruded / texture evolution / mechanical properties / in-situ research

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LI Longhao, LIU Haolan, HU Hao, LI Xiyao, WANG Jiangwei, SONG Kexing. Effect of Deformation Temperature on Texture Evolution in Hot-extruded Copper[J]. Journal of Netshape Forming Engineering. 2026, 18(9): 159-167 https://doi.org/10.3969/j.issn.1674-6457.2026.09.016

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Funding

The National Natural Science Foundation of China (52401009); The Young Elite Scientists Sponsorship Program by HAST (2025HYTP044); The Fundamental Research Fund of Henan Academy of Sciences (240617059)