ULTRASONIC BENCHMARK World Federation of Centers ND E 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

2 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, For more details of the conference, visit the website at 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/ftp://ftp.cea.fr/incoming/y2k01/2014_UT_benchmark/ For any questions, please Robert Sebastien at

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 specimens o defects o probe positions A description of Matlab files Some examples of TFM images The 2014 UT Benchmark 3

Linear probe with 64 elements working at 5MHz Whole aperture -Incident dimension : 38.3 mm -Orthogonal dimension : 10 mm Gap between éléments: 0.1 mm Element width: 0.5 mm Description of the configurations Probe 38,3 mm 10 mm 4

Specimen 1 Description of the configurations Specimen, defects and probe positons 10 mm Defect 1 Defect 3 Defect 4 30 mm 2 mm 30 mm 5 mm 30 mm 10 mm Defect 2 : vertical notch Defect 3 : vertical notch Defect 4 : vertical notch 10 mm Defect 1 30 mm 10 mm Defect 1 : side drilled hole Ø2mm 45° Specimen material : carbon steel 1020 Density: 7.8 g/cm 3 c L : 5900 m/s c T : 3230 m/s 5

30 mm 45° Specimen material : carbon steel 1020 Density: 7.8 g/cm 3 c L : 5900 m/s c T : 3230 m/s 6 Defect 1 : vertical notch with ligament Defect 2 : vertical notch with ligament Specimen 2 10 mm 5 mm 10 mm Description of the configurations Specimen, defects and probe positons ligament of 5 mm ligament of 10 mm

10 mm Defect 2 Vertical notch, backwall orientation 0° 45° 50 mm 10 mm 45° 70 mm 37,5 mm Defect 1 Side drilled hole Ø2mm Defect 3 Vertical notch, backwall orientation 5° Defect 4 Vertical notch backwall orientation 10° 60 mm 10 mm 45° 37,5 mm 10 mm 45° 5° 10° Tilt 0° 7 Specimen material : stainless steel 302 Density: 8.03 g/cm 3 c L : 5660 m/s c T : 3120 m/s Specimen 3 Description of the configurations Specimen, defects and probe positons 10 mm 230 mm

8 10 mm Defect 2 Tilted notch, backwall orientation 0 ° 45° 50 mm 45° 70 mm 37,5 mm 5° Defect 1 Side drilled hole Ø2mm Defect 3 Tiletd notch, backwall orientation 5° Defect 4 Tilted notch, backwall orientation 10° 60 mm 45° 10° 37,5 mm 10 mm 45° 10 mm Tilt 20° 20° Specimen material : stainless steel 302 Density: 8.03 g/cm 3 c L : 5660 m/s c T : 3120 m/s Specimen 4 Description of the configurations Specimen, defects and probe positons 230 mm

Experimental data Full Matrix Capture data Defect typeData name (Matlab) Specimen 1 – no defect noneSpecimen1_FMC_NoDefect.mat Specimen 1 – defect 1 Side drilled hole Ø2mmSpecimen1_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 Ø2mmSpecimen3_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 Ø2mmSpecimen4_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 9

Experimental data Matlab files 10 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 samples Receivers

Direct mode LL TFM images Specimen 1 – no defect 11

TFM images Specimen 1 – defect 1 12 Direct mode LL

TFM images Specimen 1 – defect 2 13 Half skip mode TTT Direct mode LL

14 TFM images Specimen 1 – defect 3 Half skip mode TTT Direct mode LL

TFM images Specimen 1 – defect 4 15 Half skip mode TTT Direct mode LL

16 TFM images Specimen 2 – defect 1 Half skip mode TTT Direct mode LL Half skip mode TLT Half skip mode LLT

TFM images Specimen 2 – defect 2 17 Half skip mode TTT Direct mode LL Half skip mode TLT Half skip mode LLT

TFM images Specimen 3 – defect 1 18 Direct mode LL

TFM images Specimen 3 – defect 2 19 Half skip mode LLL Half skip mode TTT Direct mode LL

TFM images Specimen 3 – defect 3 20 Half skip mode LLL Half skip mode TTT Direct mode LL

TFM images Specimen 3 – defect 4 21 Half skip mode TTT Direct mode LL Half skip mode LLL

TFM images Specimen 4 – defect 1 22 Direct mode LL

TFM images Specimen 4 – defect 2 23 Half skip mode TTT Half skip mode TTLHalf skip mode LLL Half skip mode LL

TFM images Specimen 4 – defect 3 24 Half skip mode TTT Half skip mode TTLHalf skip mode LLL Half skip mode LL

TFM images Specimen 4 – defect4 25 Half skip mode TTT Half skip mode TTLHalf skip mode LLL Half skip mode LL