实验室X射线断层扫描显示材料特性和性能与内部结构演变的相关性

2019/08/04   下载量： 0 次

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采用LaVision公司的体视数字图像相关分析DVC平台，对实验室X射线断层扫描测量所获得的数据进行体相关处理分析，研究了材料特性和性能与内部结构演变的相关性。

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    Although X-rays generated from a laboratory-based tube cannot be compared with
synchrotron radiation in brilliance and monochromaticity, they are still viable and accessible in-house for ex situ or interrupted in situ X-ray tomography. This review mainly demonstrates recent works using laboratory X-ray tomography coupled with the measurements of properties or performance testing under various conditions, such as thermal, stress, or electric fields. Evolvements of correlated internal structures for some typical materials were uncovered. The damage features in a graded metallic 3D mesh and a metallic glass under mechanical loading were revealed and investigated. Micro-voids with thermal treatment and void healing phenomenon with electropulsing were clearly demonstrated and quantitatively analyzed. The substance transfer around an electrode of a Li-S battery and the protective performance of a Fe-based metallic glass coating on stainless steel were monitored through electrochemical processes. It was shown that in situ studies of the laboratory X-ray tomography were suitable for the investigation of structure change under controlled conditions
and environments. An extension of the research for in situ laboratory X-ray tomography can be expected with supplementary novel techniques for internal strain, global 3D grain orientation, and a fast tomography strategy.

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北京欧兰科技发展有限公司
金牌会员 丨 第17年
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