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<p>In this work, the creep and corrosion behaviors of Mg–2wt%Y alloys with coarse-grained structure (100&#xa0;μm: CG sample) and fine-grained structure (25&#xa0;μm: FG sample) were investigated. The results indicated that the refinement of grain size simultaneously increased resistance to creep and corrosion. In comparison with the CG sample, the stable grain boundary strengthening induced by Y segregation and the strong restriction of twinning contributed to the superior creep resistance in the FG sample. Due to grain boundaries having higher corrosion potential than grain interior, the corrosion damage preferentially initiated in the grain interior. Thus, the high density of grain boundaries caused considerable difficulty to the movement of corrosion damage and contributed to the superior corrosion resistance of the FG sample.</p>

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Insight into the synergetic improvement of creep resistance and corrosion resistance in Mg alloys via grain refinement

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Bo Cen,
  • Jinhang Dong,
  • Dianfei Shao,
  • Yao Li,
  • Jun Liang,
  • Yuxiu Zhang

摘要

In this work, the creep and corrosion behaviors of Mg–2wt%Y alloys with coarse-grained structure (100 μm: CG sample) and fine-grained structure (25 μm: FG sample) were investigated. The results indicated that the refinement of grain size simultaneously increased resistance to creep and corrosion. In comparison with the CG sample, the stable grain boundary strengthening induced by Y segregation and the strong restriction of twinning contributed to the superior creep resistance in the FG sample. Due to grain boundaries having higher corrosion potential than grain interior, the corrosion damage preferentially initiated in the grain interior. Thus, the high density of grain boundaries caused considerable difficulty to the movement of corrosion damage and contributed to the superior corrosion resistance of the FG sample.