超声波透射技术无损评价粗晶材料平均晶粒尺寸

Nondestructive evaluation of average grain size of coarse grain materials based on ultrasonic transmissive technique

利用超声波透射法对粗晶材料的平均晶粒尺寸Ｄ进行了评定．研究结果表明，用超声波衰减变化Δα能够对材料的平均晶粒尺寸的波动进行无损评价，计算机处理曲线的变化特征与样品金相分析的结果符合得很好．

The technique for evaluating the average grain size of coarse grain materials is introdued. The average grain size D can be nondestructively evaluated by means of the change of ultrasonic attenuation Δ α . The results indicate that the characteristics of computer processing curve are identical to the metallographic analyses of samples.