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定向结晶合金材料全部工程弹性常数的超声测定 总被引:2,自引:0,他引:2
采用超声脉冲回波重合法(PulseEchoOverlap)对一种定向结晶耐高温合金材料进行了研究,精确测试了该材料中沿不同方向传播的超声纵波及横波的声速,计算出慢度曲线,并确定了材料的全部工程弹性常数.通过对工程弹性常数及慢度曲线对材料进行评价,为其工程应用提供重要依据 相似文献
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With the pulse-echo technique the ultrasonic attenuation of shear waves in amorphous PdSiAgalloy has been measured as a function of frequency and temperature.At room temperature an ap-proximate f-squared frequency dependence is obtained between 10 and 240 MHz.Below 150K,at fixed frequency there is a slow increase of attenuation with decreasing temperature and a smallultrasonic absorption peak at 35K.The linear dependence of the relative variation of the soundvelocity is observed from 35 to 300K;the temperature coefficient of sound velocity is—1.58×10~(-4)/K.Below 35K,the relative varation of the sound velocity begins to deviate from the linear dependence. 相似文献
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