Damage and Failure of Hot Dry Rock under Cyclic Liquid Nitrogen Cold Shock Treatment: A Non-destructive Ultrasonic Test Method

2022 ◽  
Author(s):  
Yong Sun ◽  
Cheng Zhai ◽  
Jizhao Xu ◽  
Xu Yu ◽  
Yuzhou Cong ◽  
...  
Keyword(s):  
Liquid Nitrogen ◽  
Cold Shock ◽  
Ultrasonic Test ◽  
Shock Treatment ◽  
Test Method ◽  
Hot Dry Rock ◽  
Damage And Failure ◽  
Non Destructive

Characterization of Silicate Ceramics Using Ultrasonics Test Method

2014 ◽  
Vol 92 ◽  
pp. 194-202 ◽  
Author(s):  
Semra Kurama ◽  
Elif Eren Gültekin
Keyword(s):  
Physical Properties ◽  
Water Absorption ◽  
Bulk Density ◽  
Test Methods ◽  
Ultrasonic Test ◽  
Test Method ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive

Non-destructive testing techniques are widely used for testing ceramic materials. In our studies, two different types of ultrasonic test methods (A-scan and C-Scan) were investigated as non-destructive testing methods for characterization of porcelain tiles. Tiles were sintered in different temperatures to change their porosity and density properties. By changing of ultrasonic time and velocity related with samples’ some physical properties (such as bulk density, apparent density, apparent porosity (%), water absorption (%)) inspected via contact A-scan ultrasonic test method. The results show that without necessity of traditional test methods, some physical properties of ceramics can be determined by using obtained ultrasonic velocity-bulk density, apparent density, apparent porosity (%) and water absorption (%) calibration plots. Additionally, various defects were inspected in samples by using water immersion ultrasonic C-scan method. These results supported this study to obtain the information about defects’ size and place in the ceramic tiles. To support this non-destructive method results scanning electron microscope (SEM) characterization was done and images give the information about the place of the defect.

Development of an ultrasonic test method for the non-destructive examination of ITER divertor components

2009 ◽  
Vol 84 (7-11) ◽  
pp. 1639-1644 ◽  
Author(s):  
Selanna Roccella ◽  
Emanuele Cacciotti ◽  
Frederic Escourbiac ◽  
Aldo Pizzuto ◽  
Bruno Riccardi ◽  
...  
Keyword(s):  
Ultrasonic Test ◽  
Test Method ◽  
Non Destructive

scholarly journals Inspection of the Composite Materials

2021 ◽  
Vol 10 (3) ◽  
pp. 146
Author(s):  
Yaser A. Jasim ◽  
Senan Thabet ◽  
Thabit H. Thabit
Keyword(s):  
Composite Materials ◽  
Visual Inspection ◽  
Magnetic Particle ◽  
Phased Array ◽  
Ultrasonic Inspection ◽  
Test Method ◽  
Main Method ◽  
Destructive Test ◽  
Eddy Current Inspection ◽  
Non Destructive

<p><em>A non-destructive test method is the main method to examine most of the materials, composite materials in particular. There are too many </em><em>Non-Destructive Test (</em><em>NDT) methods to inspect the materials such as, Visual Inspection, Liquid Penetrate Inspection, Eddy-Current Inspection, Phased Array Inspection, Magnetic Particle Inspection and Ultrasonic Inspection</em><em>.</em></p><p><em>This paper aims to creat a unified methodology for engineers depending on reaserch onion to study the inspection of the composite materials.</em></p><p><em>The researchers concluded that NDT method is the most suitable method for testing any materials and the composite materials. They also recommended to choose the most suitable NDT method as every materials and composite materials have its own properties as well as the inspection methods had its own capabilities and limitations. </em></p>

Development of Selective Seam Weld Corrosion Test Method

2014 ◽  
Author(s):  
J. A. Beavers ◽  
C. S. Brossia ◽  
R. A. Denzine
Keyword(s):  
Base Metal ◽  
Field Testing ◽  
Test Method ◽  
Transportation Safety ◽  
Seam Weld ◽  
Corrosion Kinetics ◽  
Pipeline Failures ◽  
Weld Corrosion ◽  
Pipeline Safety ◽  
Non Destructive

Selective seam weld corrosion (SSWC) of electric resistance welded (ERW) pipelines has been identified as a potential risk to pipeline safety. Due to recent pipeline failures, where seam weld defects may have played a significant role, the National Transportation Safety Board called upon the Pipeline and Hazardous Materials Safety Administration (PHMSA) to conduct a comprehensive study to identify actions that can be used by operators to eliminate catastrophic longitudinal seam failures in pipelines. Battelle contracted Kiefner and Associates, Inc. and Det Norse Veritas (U.S.A.) Inc. (DNV GL) with the objective to assist PHMSA in addressing this issue. The objective of one of the tasks performed by DNV GL was to develop a reliable, rapid, non-destructive, field-deployable test method that can quantify SSWC susceptibility on operating pipelines containing ERW seams. For this effort, two different, field deployable, non-destructive methods were evaluated in laboratory testing. The methods were validated using a standard destructive test for assessing SSWC susceptibility. One method was based on measurement of the local potential difference between the seam weld and the adjacent base metal while the second was based on differences in the corrosion kinetics between the seam weld and the base metal. The method that is based on corrosion kinetics was found to be most effective in identifying SSWC susceptible pipe steels. It utilizes a barnacle cell to conduct linear polarization resistance measurements on small, selected areas of the pipe (e.g., the weldment or base metal). Additional laboratory as well as field-testing is planned to further validate the test method.

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