TY - JOUR
T1 - Anisotropy Detection in Small Area of Materials using Surface Acoustic Waves (Basic Research on Utilization of Ultrasonic Reflectivity Measurement for Estimating Elastic Anisotropy)
AU - Ihara, Ikuo
AU - Aizawa, Tatsuhiko
AU - Koguchi, Hideo
AU - Kihara, Junji
PY - 1995
Y1 - 1995
N2 - An ultrasonic reflectivity measurement technique is applied to anisotropy detection within a small area of material. The ultrasonic reflectivity is microscopically measured using an ultrasonic microspectrometer with spherical-planar-pair lenses. The acoustic reflection coefficients of small area on a water-cubic (111) interface were measured for an incident wave at an angle θ to the normal and ɸ to some direction lying in the (111) surface. The reflection coefficients measured as a function of θ and ɸ were in good agreement with the theoretical calculation. This reveals that the microscopically measured reflection coefficient is reasonable and can be used as a promising detector of anisotropy in a small area. Furthermore, a mean reflection coefficient is defined for quantitative evaluation of elastic anisoropy in a small area of polycrystalline materials. It has been confirmed that, by performing numerical and experimental examinations with texture-controlled steels, the reflection coefficient measured in polycrystalline materials corresponds to the mean reflection coefficient.
AB - An ultrasonic reflectivity measurement technique is applied to anisotropy detection within a small area of material. The ultrasonic reflectivity is microscopically measured using an ultrasonic microspectrometer with spherical-planar-pair lenses. The acoustic reflection coefficients of small area on a water-cubic (111) interface were measured for an incident wave at an angle θ to the normal and ɸ to some direction lying in the (111) surface. The reflection coefficients measured as a function of θ and ɸ were in good agreement with the theoretical calculation. This reveals that the microscopically measured reflection coefficient is reasonable and can be used as a promising detector of anisotropy in a small area. Furthermore, a mean reflection coefficient is defined for quantitative evaluation of elastic anisoropy in a small area of polycrystalline materials. It has been confirmed that, by performing numerical and experimental examinations with texture-controlled steels, the reflection coefficient measured in polycrystalline materials corresponds to the mean reflection coefficient.
KW - Anisotropy
KW - Elasticity
KW - Measurement
KW - Nondestructive Inspection
KW - Small Area
KW - Surface Wave
KW - Ultrasonic Inspection
KW - Ultrasonic Reflectivity
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U2 - 10.1299/kikaia.61.769
DO - 10.1299/kikaia.61.769
M3 - Article
AN - SCOPUS:0029292626
SN - 0387-5008
VL - 61
SP - 769
EP - 776
JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
IS - 584
ER -