The scattering of ultrasonic waves by multiphase polycrystals
The scattering of ultrasonic waves by multiphase polycrystals
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多相多晶对超声波的散射
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
S. Hirsekorn
中科院分区：
文献类型：
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作者：
S. Hirsekorn
在以前的文章中提出的单相多晶体中的超声传播理论[J. Acoust. Soc. Am. 72，1021-1031（1982）; 73，1160-1163（1983）]被推广用于计算多相多晶体中平面纵波和横波的散射系数和相速度及群速度。在二阶微扰理论中，对具有立方、六方或正交单晶对称相的宏观各向同性材料进行了分析计算，假设多晶中的波数相对于其均匀各向同性近似的相对平均二次偏差很小。对α-和γ-Fe两相材料进行了数值计算。
The theory of ultrasonic propagation in single‐phase polycrystals presented in previous articles [J. Acoust. Soc. Am. 72, 1021–1031 (1982); 73, 1160–1163 (1983)] is generalized to calculate the scattering coefficients and phase and group velocities of plane compressional and shear waves in multiphase polycrystals. The analytical calculation was done for macroscopically isotropic materials with phases of cubic, hexagonal, or orthorhombic single‐crystal symmetry in second‐order perturbation theory using the assumption that the relative mean quadratic deviation of the wavenumbers in the polycrystal considered from its homogeneous isotropic approximation is small. Numerical evaluation is carried out for a two‐phase material of α‐ and γ‐Fe.