Scholarlink

<p>Processing Mg and its alloys at room temperature is challenging due to their poor formability. In this work, commercial pure Mg was successfully processed by the Friction-Assisted Lateral Extrusion Process (FALEP) at room temperature to obtain ultrafine-grain microstructure and high mechanical strength. During one single step of FALEP, a shear strain of 10 was imposed on the produced sheet. The microstructure and crystallographic texture evolutions during FALEP were examined by electron backscatter diffraction (EBSD) and X-ray diffraction, and the mechanical properties were examined by tensile tests. Polycrystal simulation was also performed to shed light on the texture evolution and deformation characteristics. It was found that after processing, equiaxed ultrafine-grain microstructure was obtained with a grain size of 0.7&#xa0;<i>μ</i>m and large fractions of high-angle grain boundaries. The occurrence of continuous dynamic recrystallization was observed during FALEP. The simulated textures were in good agreement with the textures obtained from X-ray measurements, with the appearance of basal-type B-fiber and absence of the other ideal fibers of shear deformation. The tensile strength of Mg after FALEP increased significantly from 124&#xa0;MPa to 212 due to the extreme grain refinement, which is comparable to that obtained in 4 to 6 passes of ECAP.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Extreme Grain Refinement in Magnesium at Room Temperature by the Friction-Assisted Lateral Extrusion Process in a Single Pass

  • 期刊论文

  • 发表日期：

    2026年2月28日

查看全文
  • Viet Q. Vu,
  • Thi-Thanh-Nga Nguyen,
  • Anh-Tuan Dang,
  • Abhishek Pariyar,
  • Laszlo S. Toth

摘要

Processing Mg and its alloys at room temperature is challenging due to their poor formability. In this work, commercial pure Mg was successfully processed by the Friction-Assisted Lateral Extrusion Process (FALEP) at room temperature to obtain ultrafine-grain microstructure and high mechanical strength. During one single step of FALEP, a shear strain of 10 was imposed on the produced sheet. The microstructure and crystallographic texture evolutions during FALEP were examined by electron backscatter diffraction (EBSD) and X-ray diffraction, and the mechanical properties were examined by tensile tests. Polycrystal simulation was also performed to shed light on the texture evolution and deformation characteristics. It was found that after processing, equiaxed ultrafine-grain microstructure was obtained with a grain size of 0.7 μm and large fractions of high-angle grain boundaries. The occurrence of continuous dynamic recrystallization was observed during FALEP. The simulated textures were in good agreement with the textures obtained from X-ray measurements, with the appearance of basal-type B-fiber and absence of the other ideal fibers of shear deformation. The tensile strength of Mg after FALEP increased significantly from 124 MPa to 212 due to the extreme grain refinement, which is comparable to that obtained in 4 to 6 passes of ECAP.