کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1570810 | 1514379 | 2015 | 5 صفحه PDF | دانلود رایگان |
• Secondary phase evolution for Mg–Zn–Gd alloy during extrusion is studied.
• Orientation relation between dendritic I-phase and Mg matrix is determined.
• A new orientation relation is found between nanoscale I-phase and Mg matrix.
The secondary phases in quasicrystal-reinforced Mg–Zn–Gd alloys are investigated by transmission electron microscopy. The orientation relationships between the dendritic I-phase and the Mg matrix are identified to be [11 2¯ 0]Mg ∥[2-fold]I-phase and (0001)Mg ∥(5-fold)I-phase. We also find that the dendritic I-phase is brittle along 2-fold, 5-fold, and 3-fold atomic planes during hot extrusion. Moreover, new orientation relations [1¯ 101]Mg ∥[mirror 2-fold]I-phase and (0 1¯ 11)Mg ∥(5-fold)I-phase are found between nanoscale I-phase and Mg matrix. The findings have implications for our understanding of excellent mechanical properties of the I-phase-strengthened Mg alloys.
Journal: Materials Characterization - Volume 108, October 2015, Pages 132–136