Precipitation of quasicrystal approximant phases in an Al-Mg-Cu-Ge alloy

被引：5
|
作者：
Xia, J. H. [1 ]
Sha, G. [1 ,2 ]
Chen, Z. G. [3 ]
Liao, X. Z. [1 ]
Liu, H. W. [4 ]
Ringer, S. P. [1 ,2 ,4 ]
机构：
[1] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia
[2] Univ Sydney, ARC Ctr Excellence Design Light Met, Sydney, NSW 2006, Australia
[3] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[4] Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2013年 / 93卷 / 02期
关键词：
aluminium alloys; ageing; quasicrystal approximant; phase transformations; transmission electron microscopy; MASS-PERCENT ALLOY; METALLIC PHASE; AG ALLOY; QUASICRYSTAL; PARTICLES; SYMMETRY; SI;
D O I：
10.1080/09500839.2012.745016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cube-shaped precipitates in the peak-aged Al4.0Mg1.5Cu0.25Ge (wt.%) alloy were found to exhibit a pseudo five-fold symmetry in their electron diffraction patterns along the ?110? and ?113? zone axes of the Al matrix. These strengthening precipitates, designated as the Z, possess a structure in a transition state from an icosahedral quasicrystal phase to a face-centred cubic (FCC) quasicrystal approximant phase. After prolonged ageing, the Z phase transforms into the FCC equilibrium Z phase having atoms in a periodic icosahedral arrangement.
引用
收藏
页码：77 / 84
页数：8
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