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2014 ULTRASONIC BENCHMARK

World Federation of

Centers

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The World Federation of NDE Centers pleased to announce a new Ultrasonic Benchmark Problem for the 2014 Review of Progress in Quantitative NDE Meeting. Experiments were done with a linear array to perform full matrix capture from notched specimens . Total Focusing method (TFM) images were generated from these tests using CIVA software. We invite you to participate in this benchmark and present your results at a special benchmark session during the 2014 Review of Progress in Quantitative NDE meeting being held this year in Boise, Idaho.

The experimental data for these studies have been obtained by the Commissariat a l’énergie atomique (CEA) in France. We would like to thank the researchers at CEA for their extensive efforts in designing these benchmarks and for obtaining the responses.

Continued

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PARTICIPATION IN THE 2014 BENCHMARK SESSION

We would like to invite papers that consider the ultrasonic benchmark outlined here at the next Annual Review of Progress in Quantitative Nondestructive Evaluation (RPQNDE) meeting. This meeting will be held July 20-25, 2014 at the Boise Center in Boise, Idaho. To present a paper at that session, please note that the deadline for submitting an abstract is Monday, April 28, 2014 (mark on your abstract that it is for the benchmark session) . Also, please note that the advance registration deadline for the conference is Friday, June 20, 2014. For more details of the conference, visit the website at www.qndeprograms.org .

On the following pages is a comprehensive outline of the benchmark problem being considered. You can retrieve the experimental data files at the ftp site: ftp://ftp.cea.fr/incoming/y2k01/2014_UT_benchmark/

For any questions, please e-mail Robert Sebastien at sebastien.robert@cea.fr

Full Matrix Capture (FMC) acquisitions have been carried out to image notches in 4 specimens :

• specimen 1 contains vertical notches of different heights : 2, 5 and 10 mm• specimen 2 contains identical vertical notches with different ligaments : 5 and 10 mm • specimen 3 contains identical vertical notches located at inclined backwalls : 0, 5 and 10°• specimen 4 contains identical tilted notches located at inclined backwalls : 0, 5 and 10°

The same linear phased array has been used for all the acquisitions

The used system is a MultiX system (M2M) with 128 parallel channels

FMC data are recorded in Matlab files (1 file for 1 defect)

For each acquisition, the probe has been positioned so that the angle between the probe axis and the defect direction corresponds to 45°

We will give in this document:• A description of the configurations:

o specimenso defectso probe positions

• A description of Matlab files• Some examples of TFM images

The 2014 UT Benchmark

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Linear probe with 64 elements working at 5MHz

Whole aperture- Incident dimension : 38.3 mm- Orthogonal dimension : 10 mm

Gap between éléments: 0.1 mmElement width: 0.5 mm

Description of the configurationsProbe

38,3 mm10 mm

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Specimen 1

Description of the configurationsSpecimen , defects and probe positons

10 mm

10 mm

10 mm

Defect 1

Defect 3

Defect 4

30 mm2 mm

30 mm5 mm

30 mm10 mm

Defect 2 : vertical notch

Defect 3 : vertical notch

Defect 4 : vertical notch

10 mmDefect 1 30 mm10 mm

Defect 1 : side drilled hole Ø2mm

45°

45°

45°

45°

Specimen material : carbon steel 1020Density: 7.8 g/cm3

cL: 5900 m/scT: 3230 m/s

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30 mm

30 mm

45°

45°

Specimen material : carbon steel 1020Density: 7.8 g/cm3

cL: 5900 m/scT: 3230 m/s

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Defect 1 : vertical notch with ligament

Defect 2 : vertical notch with ligament

Specimen 2

10 mm

10 mm

10 mm

5 mm

10 mm

10 mm

Description of the configurationsSpecimen , defects and probe positons

ligament of 5 mm

ligament of 10 mm

10 mm

Defect 2Vertical notch , backwall orientation 0°

45°

45°

50 mm

10 mm45°

70 mm

37,5 mmDefect 1Side drilled hole Ø2mm

Defect 3Vertical notch, backwall orientation 5°

Defect 4Vertical notch backwall orientation 10° 60 mm

10 mm45°

37,5 mm

10 mm45°

5°

10°

Tilt 0°

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Specimen material : stainless steel 302Density: 8.03 g/cm3

cL: 5660 m/scT: 3120 m/s

Specimen 3

Description of the configurationsSpecimen , defects and probe positons

10 mm

230 mm

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10 mm

Defect 2Tilted notch, backwall orientation 0°

45°

45°

50 mm45°

70 mm

37,5 mm

5°

Defect 1Side drilled hole Ø2mm

Defect 3Tiletd notch, backwall orientation 5°

Defect 4Tilted notch, backwall orientation 10° 60 mm45°

10°

37,5 mm10 mm

45°

10 mm

10 mm

Tilt 20°

20°

Specimen material : stainless steel 302Density: 8.03 g/cm3

cL: 5660 m/scT: 3120 m/s

Specimen 4

Description of the configurationsSpecimen , defects and probe positons

230 mm

Experimental dataFull Matrix Capture data

Defect type Data name (Matlab)

Specimen 1 – no defect none Specimen1_FMC_NoDefect.mat

Specimen 1 – defect 1 Side drilled hole Ø2mm Specimen1_FMC_Defect1.mat

Specimen 1 – defect 2 2 mm vertical notch, no ligament, backwall 0° Specimen1_FMC_Defect2.mat

Specimen 1 – defect 3 5 mm vertical notch, no ligament, backwall 0° Specimen1_FMC_Defect3.mat

Specimen 1 – defect 4 10 mm vertical notch, no ligament, backwall 0° Specimen1_FMC_Defect4.mat

Specimen 2 – defect 1 10 mm vertical notch, 5 mm ligament, backwall 0° Specimen2_FMC_Defect1.mat

Specimen 2 – defect 2 10 mm vertical notch, 10 mm ligament, backwall 0° Specimen2_FMC_Defect2.mat

Specimen 3 – defect 1 Side drilled hole Ø2mm Specimen3_FMC_Defect1.mat

Specimen 3 – defect 2 10 mm vertical notch, no ligament, backwall orientation 0° Specimen3_FMC_Defect2.mat

Specimen 3 – defect 3 10 mm vertical notch, no ligament, backwall orientation 5° Specimen3_FMC_Defect3.mat

Specimen 3 – defect 4 10 mm vertical notch, no ligament, backwall orientation 10° Specimen3_FMC_Defect4.mat

Specimen 4 – defect 1 Side drilled hole Ø2mm Specimen4_FMC_Defect1.mat

Specimen 4 – defect 2 10 mm notch, 20° tilt, no ligament, backwall orientation 0° Specimen4_FMC_Defect2.mat

Specimen 4 – defect 3 10 mm notch, 20° tilt, no ligament, backwall orientation 5° Specimen4_FMC_Defect3.mat

Specimen 4 – defect 4 10 mm notch, 20° tilt, no ligament, backwall orientation 10° Specimen4_FMC_Defect4.mat

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Experimental dataMatlab files

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K : matrix of the inter-element impulse responses

K : 64 x 64 x 1700

fe : sampling frequency (100 MHz)

retard : acquisition delay (5 µs)

voies : number of channels / elements (64 elements)

Transmitters Time samplesReceivers

Direct mode LL

TFM imagesSpecimen 1 – no defect

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TFM imagesSpecimen 1 – defect 1

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Direct mode LL

TFM imagesSpecimen 1 – defect 2

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Half skip mode TTTDirect mode LL

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TFM imagesSpecimen 1 – defect 3

Half skip mode TTTDirect mode LL

TFM imagesSpecimen 1 – defect 4

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Half skip mode TTTDirect mode LL

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TFM imagesSpecimen 2 – defect 1

Half skip mode TTTDirect mode LL

Half skip mode TLTHalf skip mode LLT

TFM imagesSpecimen 2 – defect 2

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Half skip mode TTTDirect mode LL

Half skip mode TLTHalf skip mode LLT

TFM imagesSpecimen 3 – defect 1

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Direct mode LL

TFM imagesSpecimen 3 – defect 2

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Half skip mode LLL

Half skip mode TTTDirect mode LL

TFM imagesSpecimen 3 – defect 3

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Half skip mode LLL

Half skip mode TTTDirect mode LL

TFM imagesSpecimen 3 – defect 4

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Half skip mode TTTDirect mode LL

Half skip mode LLL

TFM imagesSpecimen 4 – defect 1

22Direct mode LL

TFM imagesSpecimen 4 – defect 2

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Half skip mode TTT

Half skip mode TTLHalf skip mode LLL

Half skip mode LL

TFM imagesSpecimen 4 – defect 3

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Half skip mode TTT

Half skip mode TTLHalf skip mode LLL

Half skip mode LL

TFM imagesSpecimen 4 – defect4

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Half skip mode TTT

Half skip mode TTLHalf skip mode LLL

Half skip mode LL