Shear-wave time of flight diffraction (S-TOFD) technique

G. Baskaran; Krishnan Balasubramaniam; C. Lakshmana Rao

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Shear-wave time of flight diffraction (S-TOFD) technique

机译：剪切波飞行时间衍射（S-TOFD）技术

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Ultrasonic time of flight diffraction (TOFD) for sizing defects is based on the time of flight of the diffracted echo that is generated when a longitudinal wave is incident on a crack tip. This technique has the limitation during near-surface inspection due to signal superposition. Here, this limitation is overcome by using the shear wave-diffracted signal (instead of longitudinal wave) and hence called S-TOFD. Experiments were conducted on samples with defect tip closer to the surface of a flat plate sample to illustrate the utility of the S-TOFD technique. An increase in the flaw sizing accuracy, by using the shear wave-diffracted echoes from the tip and through the application of a signal processing technique (ESIT), was demonstrated.

机译：用于确定缺陷大小的超声飞行时间衍射（TOFD）是基于当纵波入射到裂纹尖端时产生的衍射回波的飞行时间。由于信号的叠加，该技术在近地表检查期间具有局限性。在此，通过使用剪切波衍射信号（而不是纵波）来克服此限制，因此称为S-TOFD。在缺陷尖端更靠近平板样品表面的样品上进行了实验，以说明S-TOFD技术的实用性。通过使用来自尖端的剪切波衍射回波并通过信号处理技术（ESIT）的应用，提高了缺陷定径的准确性。

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来源
《NDT & E international》 |2006年第6期|p.458-467|共10页
作者
G. Baskaran; Krishnan Balasubramaniam; C. Lakshmana Rao;
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作者单位

Department of Applied Mechanics, Centre for Nondestructive Evaluation, Indian Institute of Technology Madras, Chennai, 600 036, India;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类工业通用技术与设备;
关键词
Ultrasonic; TOFD; STOFD; ESIT;

机译：超声波;TOFD;STOFD;ESIT;

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1. Quantitative simulation of ultrasonic time of flight diffraction technique in 2D geometries using Huygens-Fresnel diffraction model: Theory and experimental comparison [J] . Kolkoori Sanjeevareddy, Venkata Krishnamurthy Chitti, Balasubramaniam Krishnan Ultrasonics . 2015,第Null期

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2. In Situ Observation of Bainite Transformation and Simultaneous Carbon Enrichment in Austenite in Low-Alloyed TRIP Steel Using Time-of-Flight Neutron Diffraction Techniques [J] . Onuki Yusuke, Hirano Takashi, Hoshikawa Akinori, Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science . 2019,第11期

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3. Evaluation Of The Phased Array Transmit-receive Longitudinal And Time-of-flight Diffraction Techniques For Inspection Of A Dissimilar Weld [J] . C Nageswaran, Colin R Bird Insight . 2008,第12期

机译：检验相异焊缝的相控阵发射-接收纵向和飞行时间衍射技术的评估
4. Inspection Using Shear Wave Time of Flight Diffraction (S-TOFD) Technique [C] . G. Baskaran, Krishnan Balasubramaniam, C. V. Krishnamurthy Symposium on Quantitative Nondestructive Evaluation . 2006

机译：使用飞行飞行衍射（S-TOFD）技术检查
5. Quantitative texture analysis using time-of-flight neutron diffraction and electron back scatter diffraction. [D] . Xie, Yanxia. 2002

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6. Multi-Channel Optical Coherence Elastography Using Relative and Absolute Shear-Wave Time of Flight [O] . Eli Elyas, Alex Grimwood, Janine T. Erler, -1

机译：使用相对和绝对剪切波飞行时间的多通道光学相干弹性成像
7. In Situ Observation of Bainite Transformation and Simultaneous Carbon Enrichment in Austenite in Low-Alloyed TRIP Steel Using Time-of-Flight Neutron Diffraction Techniques [O] . Yusuke Onuki, Takashi Hirano, Akinori Hoshikawa, 2019

机译：使用飞行时间中子衍射技术原位观察低合金跳闸钢筋石英岩同时碳富集
8. AN EVALUATION OF TIME OF FLIGHT AND CONVENTIONAL DIFFRACTION TECHNIQUES AT HARWELL [R] . D. H. Day, R. N. Sinclair 1968

机译：哈威尔飞行时间和常规衍射技术的评估

Shear-wave time of flight diffraction (S-TOFD) technique

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