Analysis of the delamination detection capabilities of pulse stimulated thermographic nondestructive testing techniques

D P Almond, S G Pickering

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The delamination detection capabilities of both flash and long pulse excitation thermographic nondestructive testing (TNDT) techniques have been obtained using an analytical expression that involves delamination size and depth, thermophysical properties and the inspection system excitation energy. The possibility of using long pulse excitation in place of traditional flash excitation is discussed and considered quantitatively. It has been found that long pulse TNDT becomes an effective alternative where the delamination image contrast peak obtained in the flash variant of TNDT occurs at a time that approaches or is greater than one second. Images of simulated delaminations in aluminum alloy, mild steel, stainless steel and carbon fiber composite obtained by both TNDT techniques are presented.
Original languageEnglish
Pages (from-to)83-90
Number of pages8
JournalMaterials Evaluation
Volume72
Issue number1
Publication statusPublished - Jan 2014

Fingerprint

Nondestructive examination
Delamination
Steel fibers
Excitation energy
Stainless Steel
Carbon fibers
Carbon steel
Aluminum alloys
Thermodynamic properties
Stainless steel
Inspection
Composite materials

Keywords

  • delamination
  • nondestructive testing
  • thermography

Cite this

Analysis of the delamination detection capabilities of pulse stimulated thermographic nondestructive testing techniques. / Almond, D P; Pickering, S G.

In: Materials Evaluation, Vol. 72, No. 1, 01.2014, p. 83-90.

Research output: Contribution to journalArticle

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