Formation mechanism of quasicrystals at the nanoscale during hot compression of Mg alloys

被引：22
作者：
Huang, Hua [1 ,2 ,3 ]
Tian, Yuan [1 ,2 ]
Yuan, Guangyin [1 ,2 ]
Chen, Chunlin [3 ]
Ding, Wenjiang [1 ,2 ]
Wang, Zhongchang [3 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composite, Shanghai 200240, Peoples R China
[3] Tohoku Univ, WPI Res Ctr, Adv Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
来源：
SCRIPTA MATERIALIA | 2014年 / 78-79卷
关键词：
Mg alloys; Microstructure; Quasicrystals; Deformation; Transformation; ZN-Y ALLOYS; ICOSAHEDRAL PHASE; GD ALLOY; MAGNESIUM ALLOYS; RE ALLOYS; ZR ALLOYS; MICROSTRUCTURE; PARTICLES; EXTRUSION; BEHAVIOR;
D O I：
10.1016/j.scriptamat.2014.01.035
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A comprehensive transmission electron microscopy investigation was conducted to gain insights into how the secondary phases in Mg-1.50Zn-0.25Gd alloys are transformed during hot compression. It was found that needle-like Mg4Zn7 phases precipitate in Mg matrix, yet vanish during compression, forming nano-quasicrystals. These nano-quasicrystals are found to nucleate on the Mg4Zn7 phase with orientation relationships [1 1 (2) over bar 0](Mg) parallel to [(1) over bar 0 7](Mg4Zn7) parallel to [2-fold](I-phase), indicating that the crystal phase can transform to the quasicrystalline phase. The formation mechanism of the quasicrystals in Mg alloys at the nanoscale is also discussed. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：61 / 64
页数：4
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