Ultrasonic Testing Methods for Composite Materials

1979 ◽  
Vol 1 (2) ◽  
pp. 8 ◽  
Author(s):  
TT Chiao ◽  
KL Reifsnider ◽  
EG Henneke ◽  
KL Reifsnider
Keyword(s):  
Composite Materials ◽  
Ultrasonic Testing ◽  
Testing Methods

Elastic Modulus of Pb/Sn Solder Joints in Microelectronics

2002 ◽  
Author(s):  
Cemal Basaran ◽  
Jianbin Jiang
Keyword(s):  
Grain Size ◽  
Elastic Modulus ◽  
Single Crystal ◽  
Solder Alloy ◽  
Ultrasonic Testing ◽  
Heterogeneous Materials ◽  
Testing Methods ◽  
Nano Indentation ◽  
Deformation Kinetics ◽  
Kinetics Of

Young’s modulus (E) values published in literature for the eutectic Pb37/Sn63 and near eutectic Pb40/Sn60 solder alloy vary significantly. One reason for this discrepancy is different testing methods for highly rate sensitive heterogeneous materials, like Pb/Sn alloys, yield different results. In this paper, we study different procedures used to obtain the elastic modulus; analytically, by single crystal elasticity and experimentally by ultrasonic testing and Nano indentation. We compare these procedures and propose a procedure for elastic modulus determination. The deformation kinetics of the Pb/Sn solder alloys is discussed at the grain size level.

Ultrasonic Testing in 25 Minutes

2003 ◽  
Author(s):  
William E. Blum ◽  
Thomas Gryba¨ck
Keyword(s):  
Power Generation ◽  
Quality Control ◽  
Nondestructive Testing ◽  
Ultrasonic Testing ◽  
Basic Theory ◽  
Testing Methods ◽  
Advantages And Disadvantages ◽  
Basic Understanding ◽  
Fundamental Understanding ◽  
Nondestructive Testing Methods

Nondestructive Testing (AKA NDT, NDI, NDE) is an integral part of any power generation program. Ultrasonic Testing (UT) is one NDT method used to determine the integrity of materials and components. Managers, engineers, quality control personnel and others often require a fundamental understanding of the nondestructive testing methods used in their operations. This paper introduces basic theory, advantages and disadvantages, typical equipment and applications of ultrasonic testing. It is designed to give the reader a basic understanding of ultrasonic testing.

scholarly journals Pipe Crack Recognition Based on Eddy Current NDT and 2D Impedance Characteristics

2019 ◽  
Vol 9 (4) ◽  
pp. 689
Author(s):  
Lianshuang Dai ◽  
Hao Feng ◽  
Ting Wang ◽  
Wenbo Xuan ◽  
Ziqian Liang ◽  
...  
Keyword(s):  
Eddy Current ◽  
Ultrasonic Testing ◽  
Magnetic Flux Leakage ◽  
Non Destructive Testing ◽  
Testing Methods ◽  
Destructive Testing ◽  
Electromagnetic Acoustic Transducers ◽  
Acoustic Transducers ◽  
Non Destructive ◽  
Flux Leakage

Girth weld cracking of long-distance oil and gas pipelines yields substantial harm to pipeline safety and may cause serious accidents. As of today, non-destructive testing has been one of the most common methods for predicting potential faults and ensuring safe operation. Classical pipeline non-destructive testing methods include magnetic flux leakage testing and the use of ultrasonic testing by electromagnetic acoustic transducers. However, they are incapable of identifying the defects in complex surfaces like girth welds. Magnetic flux leakage testing exhibits poor anti-interference abilities and low space resolution. Ultrasonic testing by electromagnetic acoustic transducers suffer from low conversion efficiency and poor signal quality. In order to overcome the disadvantages of conventional pipeline non-destructive testing methods, we propose an embedded eddy current testing system by leveraging image processing and neural networks. Hough transform and the contour extraction technique are employed to extract the characteristic features from the two-dimensional (2D) eddy current impedance image. Experiment results show that the system can effectively identify the girth weld defects, featuring an accuracy of up to 92%. The low power consumption and compactness of the proposed system makes it a great candidate for pipeline inner inspection.

The Chrome Thin Coating Characteristics Using Ultrasonic Testing

2012 ◽  
Vol 253-255 ◽  
pp. 299-302
Author(s):  
Xing Guo Wang
Keyword(s):  
Coating Thickness ◽  
Ultrasonic Testing ◽  
Thin Coating ◽  
Echo Signal ◽  
Testing Methods ◽  
Thin Coatings ◽  
Comparison Error ◽  
Coating Characteristics ◽  
The Mathematical Model ◽  
Different Thickness

According to the different thickness of the thin coatings, the echo signal of ultrasonic testing was extracted. The sound velocity in the coating medium was obtained by solving the mathematical model for transfer function and the time delay spectrometry method, and the coating thickness was calculated, the comparison error of the calculated thickness and the actual thickness, combined with the actual thickness of the coating. The results showed that, two kinds of testing methods are able to detect thin coating thickness.

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