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The corrosionCorrosion behavior and residual tensile strengthStrength of extruded Mg-alloys (WE43, Mg10Gd, ZX10) were investigated by immersion in HBSS at 37 °C over varying durations. Cylindrical samples were evaluated via weight loss, while corroded tensile specimens underwent µCT-analysis before and after mechanical testing to correlate fractureFracture behavior with corrosion morphologyCorrosion morphology. Additionally, digital image correlation (DIC)Digital Image Correlation (DIC) was applied to determine the true-stress distribution. Mg10Gd exhibits slightly higher strengthStrength compared to WE43 and ZX10. Despite comparable initial strengthsStrength, ZX10 maintained superior residual strengthResidual strength over time. Pitting corrosionCorrosion has been mainly found in Mg10Gd and WE43. Its correlation to crackCrack initiation is discussed. µCT-analysis revealed that fracturesFracture occurred variably, either at the smallest cross-section, at isolated deep pits or in other critical regions. These findings support a better understanding of critical regions of non-uniform corroded Mg-alloys and the influence of the corrosionCorrosion time on the fractureFracture mechanism and strengthStrength loss.

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Corrosion Evolution of Extruded Mg-Alloys WE43, Mg10Gd, ZX10 in HBSS: Linking Residual Strength to Corrosion Morphology

  • 会议论文

  • 发表日期：

    2026年

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  • Agathi Dimakopoulou,
  • Jan Bohlen,
  • Petra Maier

摘要

The corrosionCorrosion behavior and residual tensile strengthStrength of extruded Mg-alloys (WE43, Mg10Gd, ZX10) were investigated by immersion in HBSS at 37 °C over varying durations. Cylindrical samples were evaluated via weight loss, while corroded tensile specimens underwent µCT-analysis before and after mechanical testing to correlate fractureFracture behavior with corrosion morphologyCorrosion morphology. Additionally, digital image correlation (DIC)Digital Image Correlation (DIC) was applied to determine the true-stress distribution. Mg10Gd exhibits slightly higher strengthStrength compared to WE43 and ZX10. Despite comparable initial strengthsStrength, ZX10 maintained superior residual strengthResidual strength over time. Pitting corrosionCorrosion has been mainly found in Mg10Gd and WE43. Its correlation to crackCrack initiation is discussed. µCT-analysis revealed that fracturesFracture occurred variably, either at the smallest cross-section, at isolated deep pits or in other critical regions. These findings support a better understanding of critical regions of non-uniform corroded Mg-alloys and the influence of the corrosionCorrosion time on the fractureFracture mechanism and strengthStrength loss.