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<p>Addressing the challenge of strength–precision collaborative control in the spinning forming of newly quenched 2024 aluminum alloy thin-walled ellipsoidal parts, this paper constructs a multipass shear spinning dynamic explicit model based on nonlinear dynamic contact theory through a multiscale coupling analysis method and conducts experimental verification. It reveals the correlation mechanism among process parameters, forming quality, and microstructure. The systematic study explores the influence of process parameters on forming quality, stress state, and microstructural evolution under the newly quenched treatment. The study finds that the end region of the spun part exhibits significant stress concentration due to the coupling effect of quenching residual stress and dynamic load. As the feed ratio increases, the peak equivalent plastic strain increases from 7.231 to 10.780, the three-directional spinning force and normal stress triaxiality increase simultaneously, and the friction and wear behavior exhibit a transition characteristic from “adhesion-abrasive” composite mechanism. Furthermore, when the feed ratio is 0.8 mm/r, the cumulative equivalent plastic strain triggers continuous dynamic recrystallization (DRX), the grain size is refined to 7.32 μm, the DRX content is 11.2%, and the internal strain energy and dislocation density of the material reach their lowest levels.</p>

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Study on the spinning formability and microstructural analysis of newly quenched Al–Cu–Mg (2024) alloy ellipsoidal component

  • 期刊论文

  • 发表日期：

    2025年10月13日

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  • Guang Zeng,
  • Zhengran Wang,
  • Kaixuan Li,
  • Chunjiang Zhao,
  • Yuanpeng Liu,
  • Zhenghe Wang,
  • Yishuai Zhang

摘要

Addressing the challenge of strength–precision collaborative control in the spinning forming of newly quenched 2024 aluminum alloy thin-walled ellipsoidal parts, this paper constructs a multipass shear spinning dynamic explicit model based on nonlinear dynamic contact theory through a multiscale coupling analysis method and conducts experimental verification. It reveals the correlation mechanism among process parameters, forming quality, and microstructure. The systematic study explores the influence of process parameters on forming quality, stress state, and microstructural evolution under the newly quenched treatment. The study finds that the end region of the spun part exhibits significant stress concentration due to the coupling effect of quenching residual stress and dynamic load. As the feed ratio increases, the peak equivalent plastic strain increases from 7.231 to 10.780, the three-directional spinning force and normal stress triaxiality increase simultaneously, and the friction and wear behavior exhibit a transition characteristic from “adhesion-abrasive” composite mechanism. Furthermore, when the feed ratio is 0.8 mm/r, the cumulative equivalent plastic strain triggers continuous dynamic recrystallization (DRX), the grain size is refined to 7.32 μm, the DRX content is 11.2%, and the internal strain energy and dislocation density of the material reach their lowest levels.