Secondary phases in quasicrystal-reinforced Mg–3.5Zn–0.6Gd Mg alloy
Secondary phases in quasicrystal-reinforced Mg–3.5Zn–0.6Gd Mg alloy
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DOI：
10.1016/j.matchar.2015.09.005
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发表时间：
2015-10
影响因子：
4.7
通讯作者：
Hua Huang;Hua Huang;Yuan Tian;G. Yuan;Chunlin Chen;Zhongchang Wang;W. Ding;A. Inoue
中科院分区：
文献类型：
--
作者：
Hua Huang;Hua Huang;Yuan Tian;G. Yuan;Chunlin Chen;Zhongchang Wang;W. Ding;A. Inoue
用透射电镜研究了准晶增强Mg-Zn-Gd合金的二次相。枝晶i相与Mg基体的取向关系为[11¯0]Mg∥[2-fold] i相和（0001）Mg∥(5-fold) i相。我们还发现，在热挤压过程中，枝晶i相沿2倍、5倍和3倍原子平面呈脆性。此外，在纳米级i相与Mg基体之间发现了新的取向关系[1¯101]Mg∥[镜面2-fold] i相和（0.1¯11）Mg∥(5-fold) i相。这一发现对我们理解i相强化镁合金优异的力学性能具有重要意义。
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.