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Keywords: imaging
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Journal Articles
Accepted Manuscript
Article Type: Research Papers
ASME J Nondestructive Evaluation.
Paper No: NDE-22-1010
Published Online: November 30, 2022
... the arrangement of knots in the resulting cut lumber. X-rays can image the interior of a log to detect the arrangement of the knots; however, traditional radiography measurements are two-dimensional in character and cannot provide the needed depth information. Conversely, computed tomography (CT) can provide...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. February 2022, 5(1): 011002.
Paper No: NDE-20-1096
Published Online: June 7, 2021
...-D Differential Equations in MFL ,” IEEE Trans. Magn. , 48 ( 12 ), pp. 4747 – 4756 . 10.1109/TMAG.2012.2207732 continuous and periodic condition assessment damage identification imaging under-sampling kriging prognosis Monitoring the condition and performing effective...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. November 2021, 4(4): 041005.
Paper No: NDE-20-1080
Published Online: May 4, 2021
... in transmission and the same aperture is used for the reception in plane wave imaging (PWI). A new methodology called angle beam virtual source FMC-TFM (ABVSFMC-TFM) is proposed to inspect thick attenuating materials such as nickel-base alloys. The ABVSFMC method leads to improved signal-to-noise ratio (SNR...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. August 2021, 4(3): 031001.
Paper No: NDE-20-1058
Published Online: February 3, 2021
... on a sparse grid of piezoelectric transducers for exciting and sensing GWs that under certain conditions interact with damage while propagating. In recent years, various defect imaging algorithms have been proposed for processing GWs signals and, particularly, for computing an image representing the integrity...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. November 2020, 3(4): 041004.
Paper No: NDE-19-1065
Published Online: October 15, 2020
...Collin J. C. Epstein; Ryan N. Goodner; R. Derek West; Kyle R. Thompson; Amber L. Dagel X-ray phase contrast imaging (XPCI) is a nondestructive evaluation technique that enables high-contrast detection of low-attenuation materials that are largely transparent in traditional radiography. Extending...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. May 2021, 4(2): 021004.
Paper No: NDE-20-1023
Published Online: October 14, 2020
...Wenfeng Xiao; Lingyu Yu This paper presents a non-contact air-coupled Lamb wave imaging technique using a two-dimensional (2D) cross-correlation method that not only detects the damage but also precisely quantifies for orientations and sizes. The air-coupled transducers (ACT) is used together...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. November 2020, 3(4): 041002.
Paper No: NDE-19-1061
Published Online: August 28, 2020
... microtomography system with a minimum image pixel size of 5 µ m. The microfocus X-ray source can operate with a maximum voltage of 130 kV and maximum power of 8 W. The samples were scanned with the following parameter: 100 kV, 80 µ A, rotation step of 0.50 deg with 360 deg rotation, 1.0 mm aluminum filter...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. February 2021, 4(1): 011004.
Paper No: NDE-20-1011
Published Online: June 25, 2020
... are an excellent solution for field test measurement and imaging of material damage. This study explores the use of NLU metrics based on ratios of harmonic amplitudes and frequencies to map the buildup of damage precursors, such as crystal dislocations, under cyclic loading within the microstructure of fatigued...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. February 2021, 4(1): 011003.
Paper No: NDE-19-1084
Published Online: June 8, 2020
... from interfaces are used as inputs for a newly developed imaging algorithm. The proposed method has the potential to be a reference-free and fully automated method. Standard methods to monitor bolt installations include bolt tension indicators [ 2 ] and bolt torque control [ 3 ]. An example...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. November 2020, 3(4): 041103.
Paper No: NDE-19-1064
Published Online: May 27, 2020
... to mitigate the very low-intensity throughput and achieve acceptable scan image results will be discussed. Image processing (IP) methods used to segment porosity features in the FeMnAl blocks will also be discussed. References [1] American Society for Testing and Materials (ASTM) , 1995...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. August 2020, 3(3): 031101.
Paper No: NDE-19-1049
Published Online: April 8, 2020
..., it is important to assess how well the required inspection and measurement tasks can be performed. Furthermore, it can be very informative to quantify image quality (IQ) metrics that can provide insight into the IQ characteristics that lead to the resulting inspection or measurement task performance. Inspection...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. August 2020, 3(3): 031106.
Paper No: NDE-19-1068
Published Online: April 8, 2020
... and imaging. The defect echo and grain noise are distinguished through analyzing the spatial location where the echo is originating from. This is achieved by estimation of the angle of arrival (AOA) of the returned echo and evaluation of the likelihood that the echo is reflected from the point where the array...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. February 2020, 3(1): 011002.
Paper No: NDE-19-1015
Published Online: October 15, 2019
... wrinkle 1 specimen and wrinkle 2 specimen were able to be detected at all frequencies using both the I-Flex probes. As observed in the previous ECA scanning results, increase in the frequency not only improves the detectability of the embedded wrinkle but also increases the noise in the images obtained...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. February 2020, 3(1): 011001.
Paper No: NDE-18-1040
Published Online: October 15, 2019
... for the quantification of complex defect using topographic primal sketch (TPS) in magnetic flux leakage (MFL) testing. This method uses four excitation patterns so as to obtain MFL images from experiment; a mean image is then produced, assuming it has 80–90% the properties of all four images. A gradient manipulation...
Journal Articles
Article Type: Research Papers
ASME J Nondestructive Evaluation. November 2019, 2(4): 040902.
Paper No: NDE-19-1023
Published Online: September 23, 2019
... of the significant features to describe the deformation of the floating cover. The findings inform the selection of the unmanned aerial vehicle assisted photogrammetry parameters for optimal flight altitude, photogrammetry image overlap, and flight grid path for future integrity assessment of the floating covers...