High-temperature deformation of the γ-Mg17Al12 complex metallic alloy

被引：54
|
作者：
Ragani, J. [1 ]
Donnadieu, P. [1 ]
Tassin, C. [1 ]
Blandin, J. J. [1 ]
机构：
[1] UMR CNRS Grenoble INP UJF, F-38402 St Martin Dheres, France
来源：
SCRIPTA MATERIALIA | 2011年 / 65卷 / 03期
关键词：
Complex metallic alloy (CMA); Al2 structure type; Mg-Al alloys; Mg17Al12; phase; High-temperature deformation; LAVES PHASE CR2NB; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; CRYSTAL-STRUCTURE; QUASI-CRYSTALS; BEHAVIOR; DISLOCATIONS; PARAMETERS; MODEL;
D O I：
10.1016/j.scriptamat.2011.04.022
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report initial results on high-temperature deformation of a complex metallic alloy, the gamma-Mg17Al12 phase, isostructural with alpha-Mn. Although, like all complex metallic alloys, the gamma-Mg17Al12, phase is brittle at room temperature, a high deformability accompanied by a strong softening was observed above 573 K (similar to 2/3melting point). Transmission electron microscopy investigation indicates that dislocation climb should be involved in the deformation mechanisms. Similarities with the deformation behaviour of quasicrystals and metallic glasses are discussed. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：253 / 256
页数：4
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