Plasticity and microstructure of Zr-Cu-Al bulk metallic glasses
Plasticity and microstructure of Zr-Cu-Al bulk metallic glasses
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DOI：
10.1016/j.scriptamat.2007.02.013
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发表时间：
2007-07-01
影响因子：
6
通讯作者：
Hono, K.
中科院分区：
文献类型：
--
作者：
Kumar, G.;Ohkubo, T.;Hono, K.
（Zr_（50）Cu_（50））（100-x）Al_x大块非晶合金（BMG）的成分变化很小，其力学行为也会发生明显的变化。与以前的报道相反，没有观察到化学或结构的不均匀性，表现出大的塑性应变的样品中，表明Zr-Cu-Al BMG的塑性是不固有的与它们的微观结构特征。塑性Zr 47.5Cu 47.5Al 5中的剪切带显示局部纳米晶化，而宏观脆性Zr 45 Cu 45 Al 10在变形过程中没有显示纳米晶化的迹象。(C)2007 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
A small variation in the composition of (Zr50Cu50)(100-x)Al-x bulk metallic glasses (BMGs) results in a markedly different mechanical behavior. In contrary to the previous reports, no chemical or structural inhomogeneities were observed in the sample that exhibits a large plastic strain, indicating that the plasticity of Zr-Cu-Al BMGs is not inherently related to their microstructural features. The shear bands in plastic Zr47.5Cu47.5Al5 show localized nanocrystallization whereas the macroscopically brittle Zr45Cu45Al10 shows no indications of nanocrystallization during deformation. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.