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<p>This study investigates the tensile deformation mechanism and mechanical properties of ZK61M magnesium alloy at room temperature under different strain rates. Specimens were stretched to 10% strain along five directions at 0° (the rolling direction, RD), 30, 45, 60, 90° (the transverse direction, TD). Yield strength generally increases with strain rate in most directions, but exhibits a decrease followed by an increase at 45°. The strain hardening exponent typically increases then decreases, while showing a slow decrease at 0.1&#xa0;s<sup>−1</sup> in the TD direction. EBSD reveals that dislocation density in the RD direction first decreases and then increases with the increase of strain rate. The strain rate significantly influences the deformation mechanism. Schmid factor analysis indicates increased activation of prismatic slip systems at higher strain rates, which dominates deformation. A bimodal distribution was observed in the (0002) pole figure at 0.1&#xa0;s<sup>−1</sup>.</p> Graphical abstract <p></p>

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The mechanical response and microstructure evolution of ZK61M magnesium alloy sheets during uniaxial tension at room temperature and different strain rates

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Yong Kang,
  • Jingzhao Wu,
  • Haolong Bai,
  • Wei Zheng,
  • Liang Chen,
  • Guanghan Dang,
  • Juanjuan Han

摘要

This study investigates the tensile deformation mechanism and mechanical properties of ZK61M magnesium alloy at room temperature under different strain rates. Specimens were stretched to 10% strain along five directions at 0° (the rolling direction, RD), 30, 45, 60, 90° (the transverse direction, TD). Yield strength generally increases with strain rate in most directions, but exhibits a decrease followed by an increase at 45°. The strain hardening exponent typically increases then decreases, while showing a slow decrease at 0.1 s−1 in the TD direction. EBSD reveals that dislocation density in the RD direction first decreases and then increases with the increase of strain rate. The strain rate significantly influences the deformation mechanism. Schmid factor analysis indicates increased activation of prismatic slip systems at higher strain rates, which dominates deformation. A bimodal distribution was observed in the (0002) pole figure at 0.1 s−1.

Graphical abstract