摘要
对经过高温热处理的Cr-Mo钢模拟试样进行了高频超声测试,对获得的底面反射波信号进行了时域分析和基于傅里叶变换的频域分析,得到了相应的超声波衰减系数、速度、底面反射波频率的变化,并建立了它们与试样平均晶粒尺寸之间的关系,对利用超声脉冲反射技术进行材料热疲劳损伤进展的早期评价具有实际意义.
This paper describes a high frequency ultrasonic temperature. Reflected echoes were analyzed both in characteristics such as attenuation coefficient, velocity and testing of Cr-Mo steel samples heat-treated at high the time and frequency domains. Ultrasonic frequency of samples being tested were obtained. Relationships between these parameters and the average grain diameter of samples were also obtained. These results are useful in early assessment of material thermal fatigue development based on ultrasonic pulse-echo techniques.
出处
《上海大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第2期162-165,共4页
Journal of Shanghai University:Natural Science Edition
基金
上海市自然科学基金资助项目(03ZR14037)
上海市高等教育发展基金资助项目(03AK19)
关键词
超声无损评价
衰减系数
速度
频率
晶粒尺寸
ultrasonic nondestructive evaluation
attenuation coefficient
velocity
frequency
grain diameter
作者简介
通信作者：马世伟（1965-），男，副研究员，博士，研究方向为信号处理．E-mail：swma@mail.shu.edu.cn。
