High-temperature deformation of the γ-Mg17Al12 complex metallic alloy
High-temperature deformation of the γ-Mg17Al12 complex metallic alloy
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DOI：
10.1016/j.scriptamat.2011.04.022
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发表时间：
2011-08
影响因子：
6
通讯作者：
J. Ragani;P. Donnadieu;C. Tassin;J. Blandin
中科院分区：
文献类型：
--
作者：
J. Ragani;P. Donnadieu;C. Tassin;J. Blandin
我们报道了一种复杂的金属合金γ-Mg17Al12相的高温变形的初步结果，该相与α-Mn是同构的。尽管像所有复杂金属合金一样，γ-Mg17Al12相在室温下是脆性的，但在573K(∼2/3熔点)以上观察到高的变形性伴随着强烈的软化。透射电子显微镜研究表明，位错攀移是变形机制之一。讨论了准晶和金属玻璃的变形行为的相似性。
We report initial results on high-temperature deformation of a complex metallic alloy, the γ-Mg17Al12phase, isostructural with α-Mn. Although, like all complex metallic alloys, the γ-Mg17Al12phase is brittle at room temperature, a high deformability accompanied by a strong softening was observed above 573 K (∼2/3 melting 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.