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In order to investigate the influence mechanism of crystal orientation on the equal channel angular pressing(ECAP) deformation of aluminum single crystals, the texture evolution, dislocation motion and strain hardening behavior of Brass, Copper and S-oriented aluminum single crystals during the pressing process were systematically examined, combining ECAP experiments, crystal plasticity finite element simulations and molecular dynamics simulations. The results show that during ECAP process, aluminum single crystals samples with three orientations experience lattice rotation around the transverse direction(TD) axis and exhibit a tendency to evolve towards an ideal shear texture through dislocation slip mechanisms dominated by Shockley partial dislocations. Additionally, the part of metastable Copper texture further evolves into a more stable Brass orientation. Compared to the Brass and S orientations, the Copper-oriented aluminum single crystal, due to its lower Schmid factor, exhibits a significant delay in the initiation of dislocation slip. For Brass-oriented aluminum single crystals, the entanglement of high-density Shockley dislocations leads to the formation of local forest dislocations, effectively hindering further dislocation slip, resulting in a significant increase in dislocation density and strong strain hardening behavior.
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Basic Information:
China Classification Code:TG379
Citation Information:
[1]ZHANG Hong-bin,CHEN Yu-qiang,LIU Bei-bei ,et al.Influence mechanism of crystal orientation on equal channel angular pressing forming of aluminum single crystal[J].Journal of Plasticity Engineering,2026,33(06):10-21.
Fund Information:
国家自然科学基金资助项目(52475346; U25A20210); 湖南省科技创新领军人才(2023RC1068); 湖南省杰出青年基金资助项目(2023JJ10019)
2026-06-17
2026-06-17
2026-06-17