面向晶粒尺寸的超声多尺度衰减评价方法

李雄兵, 宋永锋, 倪培君, 刘锋

ULTRASONIC EVALUATION METHOD FOR GRAIN SIZE BASED ON MULTI-SCALE ATTENUATION

LI Xiongbing, SONG Yongfeng, NI Peijun, LIU Feng

表1 各试样的热处理规范、厚度与平均晶粒尺寸

Table 1 Heat treatment specification, thickness and mean grain size of the samples

Sample No. Heating temperature ℃ Holding time / h Cooling method Sample thickness / mm D / mm E / % 1 1080 2 W.Q. 14.621 72.4 2.23 2 1080 4 W.Q. 14.236 82.5 3.06 3 1080 6 W.Q. 13.762 90.6 4.49 4 1080 8 W.Q. 13.546 105.6 4.06 5 1180 6 W.Q. 13.447 135.4 1.65 6 1180 8 W.Q. 12.847 141.9 2.39