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<p>The spray-extruded 7055 aluminum alloy exhibits significant anisotropy due to the fibrous texture formed by extrusion deformation, which easily leads to cracking and folding during the forging of large structural components. Targeting the unique microstructure of this composite-processed alloy, this paper combines theoretical modeling, finite element simulation, and production experiments to systematically investigate the coupled influence of multi-directional forging (MDF) parameters (initial forging temperature, deformation rate, forging passes) on the alloy’s strain distribution, dynamic recrystallization behavior, and mechanical property anisotropy, and clarifies its regulation mechanism. A strain-compensated Arrhenius constitutive model modified by the k (ε,T) coupling function is established, which is embedded into finite element software to construct a reliable MDF simulation model. The results show that 450℃, 2&#xa0;mm/s, and 3 passes are the optimal parameters; under these conditions, the strain ratio between the extrusion direction (ED) and radial direction (RD) decreases from 2.10 to 1.01, and the anisotropy coefficients of tensile strength, yield strength, and elongation are reduced to 1.00, 1.03, and 1.04 respectively, effectively improving the directional consistency of the material’s properties. This study fills the gap in MDF research on spray-extruded 7055 aluminum alloy and provides a scientific basis for the blooming process of large aluminum alloy forgings.</p>

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Study on regulating the anisotropy of mechanical properties of spray-extruded 7055 aluminum alloy by multi-directional forging

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • Menghan Wang,
  • Guojun Tang,
  • Yuanyuan Zheng,
  • Songlin Li,
  • Mingliang Cui

摘要

The spray-extruded 7055 aluminum alloy exhibits significant anisotropy due to the fibrous texture formed by extrusion deformation, which easily leads to cracking and folding during the forging of large structural components. Targeting the unique microstructure of this composite-processed alloy, this paper combines theoretical modeling, finite element simulation, and production experiments to systematically investigate the coupled influence of multi-directional forging (MDF) parameters (initial forging temperature, deformation rate, forging passes) on the alloy’s strain distribution, dynamic recrystallization behavior, and mechanical property anisotropy, and clarifies its regulation mechanism. A strain-compensated Arrhenius constitutive model modified by the k (ε,T) coupling function is established, which is embedded into finite element software to construct a reliable MDF simulation model. The results show that 450℃, 2 mm/s, and 3 passes are the optimal parameters; under these conditions, the strain ratio between the extrusion direction (ED) and radial direction (RD) decreases from 2.10 to 1.01, and the anisotropy coefficients of tensile strength, yield strength, and elongation are reduced to 1.00, 1.03, and 1.04 respectively, effectively improving the directional consistency of the material’s properties. This study fills the gap in MDF research on spray-extruded 7055 aluminum alloy and provides a scientific basis for the blooming process of large aluminum alloy forgings.