Cr-Mo钢平均晶粒尺寸的超声无损评价

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Ultrasonic Nondestructive Evaluation of Average Grain Size of Cr-Mo Steel

ZHANG Hong-da,MA Shi-wei

School of Mechatronical Engineering and Automation, Shanghai Key Laboratory of Power -Station Automation Technology, Shanghai University, Shanghai 200072, China

Received:2005-04-20 Revised:1900-01-01 Online:1900-01-01 Published:1900-01-01
Contact: MA Shi-wei

Abstract

Abstract:

This paper describes a high frequency ultrasonic testing of Cr-Mo steel samples heat-treated at high temperature. Reflected echoes were analyzed both in the time and frequency domains. Ultrasonic characteristics such as attenuation coefficient, velocity and 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.

Key words: attenuation coefficient, frequency, grain diameter

, velocity,

ultrasonic nondestructive evaluation

ZHANG Hong-da;MA Shi-wei. Ultrasonic Nondestructive Evaluation of Average Grain Size of Cr-Mo Steel[J]. Journal of Shanghai University（Natural Science Edition）.

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Ultrasonic Nondestructive Evaluation of Average Grain Size of Cr-Mo Steel

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