Location

Brunswick, ME

Start Date

1-1-1997 12:00 AM

Description

Ultrasonic testings of bimetallic welds often show the presence of false calls. In pulseecho mode at oblique incidence, these false calls are detected close to the backwall. They are generally distributed along lines parallel to the buterrings. The phenomenon is disturbing because it limits the efficiency of ultrasonic testing in the area of the backwall: false calls can be misinterpreted for echoes from defects or they can mask the presence of real defects. If a defect is detected, they also limit the possibility of characterization.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

16B

Chapter

Chapter 5: Engineered Materials

Section

Bonded Joints

Pages

1191-1197

DOI

10.1007/978-1-4615-5947-4_155

Language

en

File Format

application/pdf

Included in

Manufacturing Commons

Share

COinS
 
Jan 1st, 12:00 AM

Characterization and Interpretation of Ultrasonic Structural Echoes in Bimetallic Welds

Brunswick, ME

Ultrasonic testings of bimetallic welds often show the presence of false calls. In pulseecho mode at oblique incidence, these false calls are detected close to the backwall. They are generally distributed along lines parallel to the buterrings. The phenomenon is disturbing because it limits the efficiency of ultrasonic testing in the area of the backwall: false calls can be misinterpreted for echoes from defects or they can mask the presence of real defects. If a defect is detected, they also limit the possibility of characterization.