In situ X-ray tomography measurements of deformation in cellular solids
In situ X-ray tomography measurements of deformation in cellular solids
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DOI：
10.1557/mrs2003.82
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发表时间：
2003-04-01
期刊：
影响因子：
5
通讯作者：
Salvo, L
中科院分区：
文献类型：
--
作者：
Maire, E;Elmoutaouakkil, A;Salvo, L
本文综述了微层析成像技术在研究细胞状固体的结构，特别是变形模式方面的应用。首先，对该技术进行了详细描述。从最近的文献和作者自己的工作中，举例说明了原位变形与三维（3D）成像耦合的力量。最详细的例子是对几种不同泡沫铝试样的变形模式进行了研究。研究了四种闭孔泡沫，对应于目前不同的制造路线。初始宏观结构使用3D图像结合3D粒度测定法进行量化，允许检索有关细胞大小、行走和支撑厚度的相关信息。在原位压缩实验中，泡沫的整体行为表现出不同的材料带。其中一些变化可以用样品的已知微观结构和测量宏观结构的差异来解释。
The use of microtomography to study the structure and especially the deformation modes of cellular solids is reviewed in this article. First, the technique is described in detail. Examples illustrating the power of the coupling of in situ deformation with three-dimensional (3D) imaging, drawn from the recent literature and the authors' own work, are then given. The most detailed example is the study of the deformation modes of several samples made of different aluminum foams. Four kinds of closed-cell foams were investigated, corresponding to different routes available today for their manufacture. The initial macrostructure was quantified using the 3D images combined with 3D granulometry, allowing retrieval of pertinent information about the cells size and the walk and strut thicknesses. The global behavior exhibited by the foams during the in situ compression experiments was shown to vary from one band of material to another. Some of these variations can be explained by differences in the known microstructure and the measured macrostructure of the samples.