Deformation behavior of Nb nanowires in TiNiCu shape memory alloy matrix
Deformation behavior of Nb nanowires in TiNiCu shape memory alloy matrix
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TiNiCu形状记忆合金基体中Nb纳米线的变形行为
DOI：
10.1016/j.msea.2015.08.047
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发表时间：
2015
期刊：
影响因子：
6.4
通讯作者：
Cui Lishan
中科院分区：
文献类型：
--
作者：
Jiang Daqiang;Liu Yinong;Yu Cun;Liu Weilong;Yang Hong;Jiang Xiaohua;Ren Yang;Cui Lishan
基于相变基体与高强度纳米材料之间的应变欠匹配概念，制备了原位纳米线Nb/TiNiCu复合材料。利用同步辐射X射线衍射技术研究了Nb纳米线在TiNiCu基体上不同变形方式下的变形行为。当基体通过马氏体相变变形时，Nb纳米线的最大晶格应变约为5%;当基体通过位错滑移塑性变形时，Nb纳米线的最大晶格应变约为1%。当基体在塑性变形和马氏体相变的混合模式下变形时，Nb纳米线显示出3.5%的晶格应变，这意味着塑性变形的发生并不妨碍载荷从基体传递到纳米线。
An in-situ nanowire Nb/TiNiCu composite is fabricated based on the concept of strain under-matching between a phase transforming matrix and high strength nanomaterials. The deformation behavior of the Nb nanowire was investigated by means of in-situ synchrotron X-ray diffraction when the TiNiCu matrix underwent different deformation modes. The maximum lattice strain of the Nb nanowires was about 5% when the matrix deformed via martensitic transformation or 1% when deforming plastically by dislocation slip. The Nb nanowires showed a lattice strain of 3.5% when the matrix deformed in the mixed mode of plastic deformation and martensitic transformation, which means that the occurrence of plastic deformation does not impede load transfer from the matrix to the nanowires.