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<p>During the cold deep drawing of AZ31 magnesium alloy sheets, the wall region is the primary site of failure, which restricts its widespread application. Therefore, by combining multi-scale characterization techniques with crystal plasticity finite element simulations, we systematically investigated the microstructure evolution and plastic deformation mechanisms. These investigations focused on three distinct regions: the straight wall region (Wall A), the die radius region (Wall B), and the blank holder region (Wall C). The results reveal that twinning in this region primarily consists of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\( \left\{ {10\bar{1}2} \right\} \)</EquationSource> </InlineEquation> extension twins (ETs), <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\( \{ 10\bar{1}1\} \)</EquationSource> </InlineEquation> contraction twins, and double twins, including <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\{ 10\bar{1}2\} - \{ 01\bar{1}2\}\)</EquationSource> </InlineEquation> and <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\( \{ 10\bar{1}1\} -\{10\bar{1}2\}\)</EquationSource> </InlineEquation> double twins. From Wall A to Wall C, the number of <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(\{ 10\bar{1}2\}\)</EquationSource> </InlineEquation> ETs gradually decreases, while the number of other twins increases. Texture analysis demonstrates significant crystallographic reorientation, with a newly developed texture component emerging in Wall A, where grains exhibit c-axis orientation tilted from the normal direction towards the transverse direction (TD), eventually aligning parallel to TD. During cold drawing, the texture evolution induces distinct activation behaviors between basal and prismatic &lt; a &gt; slip systems, while plastic deformation accommodation occurs mainly through pyramidal &lt; c &gt; and &lt; c + a &gt; dislocations. Notably, the rapid texture evolution may contribute to localized failure.</p> Graphical Abstract <p></p>

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Towards Understanding the Influence of Non-basal Texture on Microstructure and Deformation in Cold-Drawn Magnesium Alloy Cups

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Jingjing Gao,
  • Yunxiang You,
  • Li Tan,
  • Tao Zhou,
  • Renju Cheng,
  • Jian Tu,
  • Hao Zhou

摘要

During the cold deep drawing of AZ31 magnesium alloy sheets, the wall region is the primary site of failure, which restricts its widespread application. Therefore, by combining multi-scale characterization techniques with crystal plasticity finite element simulations, we systematically investigated the microstructure evolution and plastic deformation mechanisms. These investigations focused on three distinct regions: the straight wall region (Wall A), the die radius region (Wall B), and the blank holder region (Wall C). The results reveal that twinning in this region primarily consists of \( \left\{ {10\bar{1}2} \right\} \) extension twins (ETs), \( \{ 10\bar{1}1\} \) contraction twins, and double twins, including \(\{ 10\bar{1}2\} - \{ 01\bar{1}2\}\) and \( \{ 10\bar{1}1\} -\{10\bar{1}2\}\) double twins. From Wall A to Wall C, the number of \(\{ 10\bar{1}2\}\) ETs gradually decreases, while the number of other twins increases. Texture analysis demonstrates significant crystallographic reorientation, with a newly developed texture component emerging in Wall A, where grains exhibit c-axis orientation tilted from the normal direction towards the transverse direction (TD), eventually aligning parallel to TD. During cold drawing, the texture evolution induces distinct activation behaviors between basal and prismatic < a > slip systems, while plastic deformation accommodation occurs mainly through pyramidal < c > and < c + a > dislocations. Notably, the rapid texture evolution may contribute to localized failure.

Graphical Abstract