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<p>In this study, we utilized Friction Stir Processing (FSP), a severe plastic deformation technique, to enhance the microstructure and mechanical properties of Al-Mg alloy. By employing electron backscatter diffraction stitching techniques, transmission electron microscopy, scanning electron microscopy, hardness, and tensile testing, we explored the connections between recrystallization behavior, texture evolution, and mechanical properties, revealing the mechanisms underlying fracture and strengthening. After FSP, the alloy’s average grain size was significantly reduced from 12.67&#xa0;μm to 3.34&#xa0;μm, a 73.6% refinement. With increased duration of shear action, the material transitioned from recrystallization behavior to shear deformation. At a moderate feed rate of 33&#xa0;mm/min, the alloy displayed optimal mechanical properties, achieving an ultimate tensile strength of 311.6&#xa0;MPa and an elongation of 21.2%. The fracture mechanism was predominantly ductile fracture. Our analysis of the interaction between recrystallization behaviors and plastic deformation uncovered competitive relationships among the alloy’s strengthening mechanisms. These findings highlight the significant advantages of FSP in modifying material structures, providing both theoretical and experimental foundations for developing fine-grained, high-strength aluminum alloys.</p>

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Microstructural Evolution, Texture Transformation and Mechanical Properties of Al-Mg Alloy Processed by Friction Stir Processing

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Jiyu Wu,
  • Tao Jiang,
  • Lin Sun,
  • Yong Li,
  • Yonghui Sun,
  • Zhonglin Hou,
  • Hongyang Zhao,
  • Guangming Xu,
  • Zhaodong Wang

摘要

In this study, we utilized Friction Stir Processing (FSP), a severe plastic deformation technique, to enhance the microstructure and mechanical properties of Al-Mg alloy. By employing electron backscatter diffraction stitching techniques, transmission electron microscopy, scanning electron microscopy, hardness, and tensile testing, we explored the connections between recrystallization behavior, texture evolution, and mechanical properties, revealing the mechanisms underlying fracture and strengthening. After FSP, the alloy’s average grain size was significantly reduced from 12.67 μm to 3.34 μm, a 73.6% refinement. With increased duration of shear action, the material transitioned from recrystallization behavior to shear deformation. At a moderate feed rate of 33 mm/min, the alloy displayed optimal mechanical properties, achieving an ultimate tensile strength of 311.6 MPa and an elongation of 21.2%. The fracture mechanism was predominantly ductile fracture. Our analysis of the interaction between recrystallization behaviors and plastic deformation uncovered competitive relationships among the alloy’s strengthening mechanisms. These findings highlight the significant advantages of FSP in modifying material structures, providing both theoretical and experimental foundations for developing fine-grained, high-strength aluminum alloys.