| 厚壁CCASS材料特性及其对超声检测的影响 |
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| 引用本文： | 瞿宁,陈军,赵天伟,罗忠兵,杨会敏,刘丽丽,林莉.厚壁CCASS材料特性及其对超声检测的影响[J].失效分析与预防,2013(4):197-201,211. |
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| 作者姓名： | 瞿宁 陈军 赵天伟 罗忠兵 杨会敏 刘丽丽 林莉 |
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| 作者单位： | [1]大连理工大学无损检测研究所,辽宁大连116085 [2]核工业工程研究设计有限公司,北京101601 |
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| 基金项目： | “十二五”国防基础科研重点资助项目（A0220110004） |
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| 摘 要： | 对壁厚98 mm的离心铸造奥氏体不锈钢(Centrifugally Cast Austenitic Stainless Steel,CCASS)试样的纵波声速、衰减系数和幅度谱等声学特性进行了测试分析,并采用TRL相控阵探头进行扇形扫描和B扫描检测。结合试样的宏观、微观组织对实验结果进行了分析讨论。研究表明:试样晶粒粗大,内部组织存在分层,介质的非均质性明显,导致超声检测信号噪声水平高、幅度谱波动大,纵波声速和衰减系数在一定范围内变化,相控阵扇形扫查和B扫查成像效果较差。利用CIVA软件得到的模拟结果为解释上述实验现象提供了依据。
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| 关 键 词： | 离心铸造奥氏体不锈钢 超声检测 声速 衰减系数 相控阵超声 |
Investigations on Material Properties of Thick-wall CCASS and Their Effects on Ultrasonic Testing |
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| QU Ning,CHEN Jun,ZHAO Tian-wei,LUO Zhong-bing,YANG Hui-min,LIU Li-li,LIN Li.Investigations on Material Properties of Thick-wall CCASS and Their Effects on Ultrasonic Testing[J].Failure Analysis and Prevention,2013(4):197-201,211. |
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| Authors: | QU Ning CHEN Jun ZHAO Tian-wei LUO Zhong-bing YANG Hui-min LIU Li-li LIN Li |
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| Affiliation: | 1 (1. Nondestructive Testing ＆ Evaluation Laboratory, Dalian University of Technology, Liaoning Dalian 116085, China; 2. Nuclear Industry Research and Engineering Co., Ltd., Beijing 101601, China) |
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| Abstract: | The acoustic properties of Centrifugally Cast Austenitic Stainless Steel （CCASS）, longitudinal wave velocity, attenuation coefficient and amplitude spectrum, were tested and analyzed with the 98 mm thickness specimen. S-scan and B-scan were conducted using the TRL phased array probe. The results were discussed in virtue of the macro- and microstructure. It shows that coarse grains, mnlti-layers and obvious heterogeneity in the sample led to the high level noise and large fluctuation of amplitude spectrum. The longitudinal wave velocity and attenuation coefficient also varied to some content. Thus, poorer imaging of S-scan and B-scan were obtained. Simulation results obtained from the CIVA software were in accordance with the results above ~ |
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| Keywords: | CCASS ultrasonic testing velocity attenuation coefficient ultrasonic phased array |
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