Location

Snowmass Village, CO

Start Date

1-1-1995 12:00 AM

Description

Crack detection is one of the major areas of interest in thermal non-destructive testing. Cracks provide a very difficult target for thermal NDT due to several reasons. In thermal methods a heat pulse is usually applied to the surface of an inspected sample and that pulse propagates into the sample in a direction perpendicular to the surface plane. This means that the cracks opening to the surface are not necessarily detected since very little heat is trapped in the surface area around the crack and the infrared detectors are not sensitive enough to detect the difference in the surface temperature. Naturally, not all the cracks reach the surface, making the detection process even more cumbersome. Finally, the cracks are often extremely narrow, contributing only a very small distortion to the thermal characteristics of the sample.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

14A

Chapter

Chapter 1: Standard Techniques

Section

Thermal Techniques

Pages

447-452

DOI

10.1007/978-1-4615-1987-4_53

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Observations on Image Formation in the Line Scanning Thermal Imaging Method

Snowmass Village, CO

Crack detection is one of the major areas of interest in thermal non-destructive testing. Cracks provide a very difficult target for thermal NDT due to several reasons. In thermal methods a heat pulse is usually applied to the surface of an inspected sample and that pulse propagates into the sample in a direction perpendicular to the surface plane. This means that the cracks opening to the surface are not necessarily detected since very little heat is trapped in the surface area around the crack and the infrared detectors are not sensitive enough to detect the difference in the surface temperature. Naturally, not all the cracks reach the surface, making the detection process even more cumbersome. Finally, the cracks are often extremely narrow, contributing only a very small distortion to the thermal characteristics of the sample.