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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Apparent texture symmetry deviations in aluminum sheet
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Apparent texture symmetry deviations in aluminum sheet

机译：铝板的明显纹理对称性偏差

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摘要

An ultrasonic texture measurement system for sheet metal is being developed using rotating electromagnetic acoustic transducers (EMATs). We report on further investigations of deviation from theoretically predicted symmetries in the elastic constants (as measured ultrasonically using the aforementioned system) of cold-rolled aluminum sheet reported in earlier publications. A study of the effects of annealing and deliberate deformation (both elastic arid plastic) are used to develop an explanation of the nature and likely origin of this asymmetry. These deviations from symmetry cannot be detected by ultrasonic Lamb wave measurement in three directions alone. Texture asymmetry is relevant to the sheet metal manufacturer as it affects formability and may indicate processing problems. Results indicate that the asymmetry in the measured ultrasonic Lamb wave velocities on either side of the rolling direction is due to a stress effect rather than crystallographic texture.
机译：正在使用旋转电磁声换能器（EMAT）开发用于钣金的超声纹理测量系统。我们报告了对较早出版的冷轧铝板的弹性常数（如使用上述系统超声测量）的弹性常数与理论预测对称性偏差的进一步研究的报告。对退火和故意变形（包括弹性和塑性）的影响进行了研究，以解释这种不对称的性质和起源。仅通过超声波兰姆波测量不能仅在三个方向上检测到这些与对称性的偏差。纹理不对称性与钣金制造商有关，因为它会影响可成形性并可能指示加工问题。结果表明，在轧制方向的任一侧上测得的超声波兰姆波速度的不对称性是由于应力效应而不是结晶织构引起的。

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