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<p>The correlation between the basal {0001}&lt;11–20&gt;-oriented grains and the stored energy was established using the kernel average misorientation (KAM) approach for AZ31 (Mg-3Al-1Zn, % wt.%) alloy after hot rolling at 350&#xa0;°C for 70% thickness reduction and subsequent annealing treatment at 250 and 350&#xa0;°C for 30&#xa0;min. The orientation of the grains was divided into 4 categories based on their deviation from the ideal position of the basal orientation: (1) 0–15°, (2) 15–30°, (3) 30–45°, and (4) off-basal. The results evidence that the stored energy of the hot-rolled sample varies as <i>E</i><sub><i>Off-basal</i></sub><i> &gt; E</i><sub><i>30-45°</i></sub><i> &gt; E</i><sub><i>15-30°</i></sub><i> &gt; E</i><sub><i>0-15°</i></sub>. Increasing annealing temperature causes the loosing of this hierarchy due to the static recrystallization and grain growth process. The evolution of the mean grain size and the volume fraction of deformed and recrystallized oriented grains was discussed based on their stored energy values. Accordingly, the mean grain size of recrystallized grains seemed to be inversely related to the stored energy of the grains, i.e. <i>d</i><sub><i>Off-basal</i></sub><i> &lt; d</i><sub><i>30-45°</i></sub><i> &lt; d</i><sub><i>15-30°</i></sub><i> &lt; d</i><sub><i>0-15°</i></sub>.</p>

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Stored Energy in Basal-Oriented Grains of an AZ31 Alloy After Hot Rolling and Subsequent Annealing

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • Hiba Azzeddine,
  • Thierry Baudin,
  • François Brisset

摘要

The correlation between the basal {0001}<11–20>-oriented grains and the stored energy was established using the kernel average misorientation (KAM) approach for AZ31 (Mg-3Al-1Zn, % wt.%) alloy after hot rolling at 350 °C for 70% thickness reduction and subsequent annealing treatment at 250 and 350 °C for 30 min. The orientation of the grains was divided into 4 categories based on their deviation from the ideal position of the basal orientation: (1) 0–15°, (2) 15–30°, (3) 30–45°, and (4) off-basal. The results evidence that the stored energy of the hot-rolled sample varies as EOff-basal > E30-45° > E15-30° > E0-15°. Increasing annealing temperature causes the loosing of this hierarchy due to the static recrystallization and grain growth process. The evolution of the mean grain size and the volume fraction of deformed and recrystallized oriented grains was discussed based on their stored energy values. Accordingly, the mean grain size of recrystallized grains seemed to be inversely related to the stored energy of the grains, i.e. dOff-basal < d30-45° < d15-30° < d0-15°.