Spatially resolved acoustic spectroscopy for rapid imaging of material microstructure and grain orientation
Spatially resolved acoustic spectroscopy for rapid imaging of material microstructure and grain orientation
复制标题
用于材料微观结构和晶粒取向快速成像的空间分辨声波谱
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Sharples
中科院分区：
文献类型：
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作者：
Richard J. Smith;Wenqi Li;J. Coulson;M. Clark;M. Somekh;S. Sharples
测量航空材料的晶粒结构对于了解其力学性能和使用性能非常重要。空间分辨声学光谱是利用表面声波来映射材料的晶粒结构的声学技术。当与多个声传播方向的测量相结合时，可以通过将速度表面拟合到模型来获得晶粒取向。这里介绍的新仪器每秒可以进行数千次声速测量。空间和速度分辨率可以通过简单的修改系统进行调整，这是详细讨论的理论预期与实验数据的比较。
Measuring the grain structure of aerospace materials is very important to understand their mechanical properties and in-service performance. Spatially resolved acoustic spectroscopy is an acoustic technique utilizing surface acoustic waves to map the grain structure of a material. When combined with measurements in multiple acoustic propagation directions, the grain orientation can be obtained by fitting the velocity surface to a model. The new instrument presented here can take thousands of acoustic velocity measurements per second. The spatial and velocity resolution can be adjusted by simple modification to the system; this is discussed in detail by comparison of theoretical expectations with experimental data.