Nondestructive characterization of texture and plastic strain ratio of metal sheets with electromagnetic acoustic transducers
Nondestructive characterization of texture and plastic strain ratio of metal sheets with electromagnetic acoustic transducers
复制标题
使用电磁声换能器对金属板的织构和塑性应变比进行无损表征
DOI：
10.1121/1.398938
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
K. Kawashima
中科院分区：
文献类型：
--
作者：
K. Kawashima
利用已知的单晶弹性常数和电磁超声换能器（EMAT）测量的相对超声速度，非破坏性地获得了厚度小于1 mm的轧制钢板的所有最低阶独立CODF（晶粒取向分布函数）系数W400、W420和W440。所有的波，纵波，在通过厚度方向上传播的剪切波，和SH 0（剪切水平）板波的超声波速度，测量的EMAT。不需要声学耦合介质，因此可以进行快速、准确和可重复的测量。结果表明，CODF系数可以作为三个线性方程的解，其中包括测量的相对超声速度。使用获得的CODF系数绘制的超声极图与X射线极图之间总体一致。还计算了钢板的全部九个弹性常数。
All the lowest‐order independent CODF (crystallite orientation distribution function) coefficients W400, W420, and W440 of rolled steel sheets, with thickness less than 1 mm, have been obtained nondestructively by using the known single‐crystal elastic constants and the relative ultrasonic velocities measured with EMATs (electromagnetic acoustic transducers). The ultrasonic velocities of all the waves, longitudinal waves, shear waves propagating in the through thickness direction, and SH0 (shear horizontal) plate waves, were measured by the EMATs. No acoustic coupling medium was necessary, making possible quick, accurate, and reproducible measurements. It is shown that the CODF coefficients can be obtained as the solutions of three linear equations in which the measured relative ultrasonic velocities are included. There was an overall correspondence between the ultrasonic pole figures drawn using the obtained CODF coefficients and x‐ray pole figures. All nine elastic constants of a steel sheet were also c...