Title of article
Dislocation mechanism of high-temperature plastic deformation of Al–Cu–Fe and Al–Pd–Mn icosahedral quasicrystals
Author/Authors
Wang، نويسنده , , Renhui and Yang، نويسنده , , Wenge and Gui، نويسنده , , Jianian and Urban، نويسنده , , Knut، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2000
Pages
6
From page
742
To page
747
Abstract
Microstructures in hot-impacted Al62.5Cu25Fe12.5 and Al70.4Pd21.2Mn8.4 icosahedral quasicrystals (IQCs) were studied by transmission electron microscopy (TEM). Densely distributed dislocations and stacking fault (SF) type contrast were observed for the first time in Al–Cu–Fe IQC. This result confirms that dislocation motion is an important deformation mechanism for Al–Cu–Fe IQC. Moving dislocations in quasicrystalline materials leave phason-type SFs behind. In situ TEM observation shows these phasonic SFs disappear due to intense diffusion at high temperatures.
Keywords
Icosahedral quasicrystal (IQC) , Deformation mechanism , Al–Pd–Mn IQC , Al–Cu–Fe IQC
Journal title
MATERIALS SCIENCE & ENGINEERING: A
Serial Year
2000
Journal title
MATERIALS SCIENCE & ENGINEERING: A
Record number
2136493
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