Application of Full Matrix Capture and Total Focusing Method Technique of Phased Array Ultrasonic Testing for High-Attenuating Materials

2021 ◽  
Vol 41 (5) ◽  
pp. 304-311
Author(s):  
Dong Ryul Kwak ◽  
Tae Hun Lee ◽  
Wang Bae Kim
Keyword(s):  
Ultrasonic Testing ◽  
Phased Array ◽  
Full Matrix

Full Matrix Capture and Total Focusing Method: The Next Evolution in Ultrasonic Testing

NDT World ◽  
2019 ◽  
pp. 37-41
Author(s):  
Алан Колдер ◽  
Alan Caulder
Keyword(s):  
Ultrasonic Testing ◽  
Phased Array ◽  
New Techniques ◽  
Full Matrix ◽  
Major Improvement ◽  
Ultrasonic Phased Array

Full matrix capture and the total focusing method are considered by many NDT experts to be the next major improvement to phased array ultrasonic testing. This article showcases some advantages the new techniques offer compared to the capabilities of traditional ultrasonic phased array.

scholarly journals Design Considerations for the Use of Ultrasonic Phased Array Probes in Weld Inspection

2000 ◽  
Author(s):  
Paul A. Meyer
Keyword(s):  
Ultrasonic Testing ◽  
Phased Array ◽  
Design Considerations ◽  
Array Probe ◽  
Ultrasonic Phased Array ◽  
Weld Inspection ◽  
Service Inspection

Ultrasonic testing of metal welds has been in use for many years. Scanning methods using both contact and immersion methods are often used at the time of manufacture and also during periodic in-service inspection programs. But because of a variety of component configurations and potential flaw geometries it is often necessary to perform several inspections, each with a different probe configuration to assure adequate defect delegability. It is possible that a properly designed phased array probe can perform several different inspections without changing hardware thereby reducing inspection times. This presentation reviews the design and operation of ultrasonic phased array transducers and the necessary features to achieve the desired performance. Situations in which these probes have already been implemented effectively are also discussed.

Optimizing Probe Active Aperture for Phased Array Weld Inspections

2021 ◽  
Vol 79 (8) ◽  
pp. 797-804
Author(s):  
Anmol Birring
Keyword(s):  
Fracture Mechanics ◽  
Ultrasonic Testing ◽  
Phased Array ◽  
Pressure Vessels ◽  
Acceptance Criteria ◽  
Nondestructive Technique ◽  
Cross Sectional ◽  
Area Of Interest ◽  
Array Technology ◽  
Selection Of

Phased array ultrasonic testing (PAUT) has become a popular nondestructive technique for weld inspections in piping, pressure vessels, and other components such as turbines. This technique can be used both in manual and automated modes. PAUT is more attractive than conventional angle-beam ultrasonic testing (UT), as it sweeps the beam through a range of angles and presents a cross-sectional image of the area of interest. Other displays are also available depending on the software. Unlike traditional A-scan instruments, which require the reconstruction of B- and C-scan images from raster scanning, a phased array image is much simpler to produce from line scans and easier to interpret. Engineering codes have incorporated phased array technology and provide steps for standardization, scanning, and alternate acceptance criteria based on fracture mechanics. The basis of fracture mechanics is accurate defect sizing. There is, however, no guidance in codes and standards on the selection and setup of phased array probes for accurate sizing. Just like conventional probes, phased array probes have a beam spread that depends on the probe’s active aperture and frequency. Smaller phased array probes, when used for thicker sections, result in poor focusing, large beam spread, and poor discontinuity definition. This means low resolution and oversizing. Accurate sizing for fracture mechanics acceptance criteria requires probes with high resolution. In this paper, guidance is provided for the selection of phased array probes and setup parameters to improve resolution, definition, and sizing of discontinuities.

TOFD Automatic Ultrasonic Testing for Condition Monitoring of Coke Drums

2003 ◽  
Author(s):  
Jorge A. Penso ◽  
Robert Owen ◽  
Masaaki Oka
Keyword(s):  
Condition Monitoring ◽  
Ultrasonic Testing ◽  
Phased Array ◽  
Service Evaluation ◽  
Pressure Vessels ◽  
Inspection System ◽  
Delayed Coking ◽  
Advantages And Disadvantages ◽  
Mechanical Cycling ◽  
History Of

Cracking and bulging in welded and internally lined pressure vessels that work in thermal-mechanical cycling service have been well known problems in the petrochemical, power and nuclear industries. In spite of this problem has been studied during the last fifty years, published literature and industry surveys show that similar problems still occur nowadays. Typical examples of this problem are the coke drums in the delayed coking units refinery process. Delayed coking units are among the refinery units that have higher economical yields. To shut down these units represents a high negative economical impact in refinery operations. Also, the maintenance costs associated with repairs are commonly very high. Cracking and bulging occurrences in the coke drums, most often at the weld areas, characterize the history of the operation of delayed coking units. To anticipate through wall cracking in these coke drums, AUT (automatic ultrasonic testing); Dual TOFD (time of flight diffraction) and the Phased Array technique simultaneous inspection system was selected among other inspection techniques as a condition monitoring tool during an unit turnaround. The inspection methodology in combination with fracture mechanics was used to classify discontinuities as acceptable and non-acceptable. This indicated approach helped to optimize the workscope during the turnaround and establish guidelines for inspection and repair of the delayed coker unit. This work presents the different steps followed during the inspection and fitness for service evaluation. Also, this study shows advantages and disadvantages of the AUT-Phased Array technique.

Production of Realistic Flaws and Their Meaning for Ultrasonic Testing

2019 ◽  
Vol 5 (3) ◽  
Author(s):  
Jiri Hodac ◽  
Pavel Mares ◽  
Jaromir Janousek ◽  
Martin Linhart
Keyword(s):  
Staff Training ◽  
Ultrasonic Testing ◽  
Phased Array ◽  
Fatigue Cracks ◽  
Ultrasonic Test ◽  
P 75 ◽  
Array Technology ◽  
Ultrasonic Echo ◽  
Ultrasonic Phased Array ◽  
Test Result

This work is designed to artificially create test specimens with flaws that behave the same way as real-function flaws when observed by nondestructive testing (NDT) technologies. Thus, the understanding of the detection limitations of NDT methods is needed. In this study, real, realistic, and artificial flaws were compared by ultrasonic phased array technology. Fatigue flaws, which belong to the most common structural issues (Ruzicka, M., Hanke, M., and Rost, M., 1987, Dynamicka Pevnost a Zivotnost, CVUT, Prague, Czech Republic, p. 75), are investigated. Measurements have revealed significant differences in the amplitude of ultrasonic echo from fatigue cracks in distinct phases of crack propagation. Studied specimens with realistic flaws have demonstrated their quality for calibration, staff training, and NDT system qualification. More realistic test specimens will increase ultrasonic test result reliability.

Detection of the Crack on Propeller Blade by Using Phased Array Ultrasonic Testing

2020 ◽  
Vol 40 (5) ◽  
pp. 318-325
Author(s):  
Min-Saeng Kim ◽  
Jongwoon Park ◽  
Dooyoul Lee ◽  
Seil Baek
Keyword(s):  
Ultrasonic Testing ◽  
Phased Array ◽  
Propeller Blade
Sign in / Sign up

Export Citation Format

Share Document