Orientation Characterisation of Aerospace Materials by Spatially Resolved Acoustic Spectroscopy
Orientation Characterisation of Aerospace Materials by Spatially Resolved Acoustic Spectroscopy
复制标题
通过空间分辨声光谱法表征航空航天材料的取向
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
S. Sharples
中科院分区：
文献类型：
--
作者：
Wenqi Li;J. Coulson;J. Aveson;Richard J. Smith;M. Clark;M. Somekh;S. Sharples
金属的材料特性，如强度、刚度和抗断裂性，与底层的微观结构密切相关。晶体结构和取向通过刚度矩阵与超声性能相关。在单个颗粒中，可以从方向和刚度分析确定超声速度，或者从已知的方向和测量的速度确定刚度。在本文中，我们提出了一种技术，用于成像的晶粒在金属中使用空间分辨声学光谱（SRAS）和一种新的逆求解器，可以确定从已知的刚度矩阵的材料和SRAS速度测量的晶体取向。以前，我们已经证明了这种技术的能力，以确定单晶镍样品的取向，我们将该技术扩展到多晶粒工业金属，如铝，镍和铬镍铁合金。对镍样品的SRAS和电子背散射衍射（EBSD）进行了比较。SRAS是一种快速、准确、定量且强大的技术，用于对各种尺度和工业材料的材料微观结构和取向进行成像。
Material characteristics in metals such as strength, stiffness and fracture resistance are strongly related to the underlying microstructure. The crystallographic structure and orientation are related to the ultrasonic properties through the stiffness matrix. In individual grains it is possible to analytically determine the ultrasonic velocity from the orientation and stiffness, or determine the stiffness from the known orientation and measured velocity. In this paper we present a technique for imaging the crystallographic orientation of grains in metals using spatially resolved acoustic spectroscopy (SRAS) and a novel inverse solver that can determine the crystallographic orientation from the known stiffness matrix for the material and the SRAS velocity measurement. Previously we have shown the ability of this technique to determine the orientation on single crystal nickel samples; we extended the technique to multigrain industrial metals, such as aluminium, nickel and Inconel. The comparison between SRAS and electron backscatter diffraction (EBSD) on the nickel sample is presented. SRAS is a fast, accurate, quantitative and robust technique for imaging material microstructure and orientation over a wide range of scales and industrial materials.