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<p>Fine-grained thin-walled cylindrical parts of Mg-3Al-Zn alloy were prepared by ball hot-spinning (BHS) process at 300℃, and the BHS numerical analysis model was established based on finite element method. The effects of different thinning rates on the stress-strain distribution, grain size and texture evolution observed by electron back-scattering diffraction (EBSD) were revealed. The results show that spinning temperature increases with the increase of thinning rate. The wrinkling factors in the stable forming zone are all below 4% during hot spinning, and the spinnability of the alloy is significantly improved compared with normal temperature. With the increase of the thinning rate, under the active DRX and plastic deformation, the precipitated phase of Mg<sub>17</sub>Al<sub>12</sub> tends to distribute discretely with the material flow and DRX process, and the grains begin to aggregate to a smaller size, and the average grain size is only 4.59&#xa0;μm when the thinning rate is 35%. When the thinning rate is between 15% and 25%, the deviation degree of grain c-axis in TD direction increases, the plasticity and deformation uniformity of materials decrease, the strength of<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(&lt;0001&gt;\parallel RD\)</EquationSource> </InlineEquation> texture weakens, and the preferential orientation of grains decreases. The deviation degree of grain c-axis in TD direction increases, the plasticity and deformation uniformity of material decrease, the strength of texture weakens, and the preferential orientation of grain decreases. When the thinning rate reaches 30%-35%, the<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(&lt;01\overline10&gt;\parallel TD\)</EquationSource> </InlineEquation> texture is replaced by the<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(&lt;01\overline10&gt;-&lt;\overline12\overline10&gt;\parallel TD\)</EquationSource> </InlineEquation> texture, and the&#xa0;<InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(&lt;0001&gt;\parallel RD\)</EquationSource> </InlineEquation> texture density is increased.</p>

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Analysis of texture and properties of fine-grained thin-walled tubes of Mg-3Al-Zn alloy prepared by hot spinning based on experiments and simulations

  • 期刊论文

  • 发表日期：

    2025年11月27日

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  • Guang Zeng,
  • Kun Chen,
  • Meixin Ge,
  • Chunjiang Zhao,
  • Yuanpeng Liu,
  • Kaixuan Li

摘要

Fine-grained thin-walled cylindrical parts of Mg-3Al-Zn alloy were prepared by ball hot-spinning (BHS) process at 300℃, and the BHS numerical analysis model was established based on finite element method. The effects of different thinning rates on the stress-strain distribution, grain size and texture evolution observed by electron back-scattering diffraction (EBSD) were revealed. The results show that spinning temperature increases with the increase of thinning rate. The wrinkling factors in the stable forming zone are all below 4% during hot spinning, and the spinnability of the alloy is significantly improved compared with normal temperature. With the increase of the thinning rate, under the active DRX and plastic deformation, the precipitated phase of Mg17Al12 tends to distribute discretely with the material flow and DRX process, and the grains begin to aggregate to a smaller size, and the average grain size is only 4.59 μm when the thinning rate is 35%. When the thinning rate is between 15% and 25%, the deviation degree of grain c-axis in TD direction increases, the plasticity and deformation uniformity of materials decrease, the strength of \(<0001>\parallel RD\) texture weakens, and the preferential orientation of grains decreases. The deviation degree of grain c-axis in TD direction increases, the plasticity and deformation uniformity of material decrease, the strength of texture weakens, and the preferential orientation of grain decreases. When the thinning rate reaches 30%-35%, the \(<01\overline10>\parallel TD\) texture is replaced by the \(<01\overline10>-<\overline12\overline10>\parallel TD\) texture, and the  \(<0001>\parallel RD\) texture density is increased.