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通过从超声波表面波场重建颗粒边界和速度图来表征多晶微结构

Zeqing Sun¹, Shangzi Wu², Abhishek Saini¹

¹School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore.

|October 18, 2023

概括

这项研究引入了一种超声波方法,使用表面波来可视化多晶微结构. 该技术实现了亚波长分辨率,使其能够进行详细的材料表征.

科学领域:

材料科学材料科学材料科学
非破坏性测试是指非破坏性测试.
声学声学在声学方面

背景情况:

多晶微结构显著影响材料特性.
准确地描述这些微观结构对于质量控制和性能预测至关重要.
目前的方法可能缺乏详细分析所需的分辨率或非破坏性能力.

研究的目的:

开发一种新的超声波材料表征方法.
从表面波场测量中重建多晶微结构.
为了实现子波长分辨率,用于增强材料成像.

主要方法:

使用超声波表面波用于材料特性.
开发波数-频域过器,用于波元提取.
实施一个 evanescent-pass 过器用于谷物边界重建.
使用定向过器来绘制表面波速的地图.

主要成果:

证明了多晶微结构的成功重建.
通过数值模拟和对增材制造样本的实验测试进行验证.
在特定的数据采集条件下实现子波长分辨率.

结论:

建议的超声波方法有效地重建了微观结构.
开发的过器允许对粒度边界和波速进行详细分析.
这种技术为先进材料表征提供了一个有前途的非破坏性方法.

关键词:

材料表征材料的表征这是一种多晶体.亚波长分辨率的分辨率是什么超声波表面波是超声波的表面波.波数频域波数频域

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X-ray Crystallography

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