Thermal Non-Destructive Testing for the Titanium Implants

Abstract

Active thermal NDT is a promising technique for the detection of structural defects in solids. In this paper, the results of the first-stage research devoted to infrared thermographic detection of cracks in titanium alloys are presented. The test results obtained show that the Fourier analysis is a convenient data processing technique in active thermal NDT. Images of phase are more noise-resistant and able to reveal deeper defects compared to images of amplitude. In application to the inspection of bottom-hole defects in 9.6 mm-thick Ti6Al4V titanium alloy samples, it has been found that a minimum detected defect should have diameter from one to two times greater than its depth.

Golay coded thermal wave imaging for inclusions inspection in titanium alloy (Ti-6Al-4V): an analytical study

“…Further, the modeled 1D and 3D specimen was exposed to coded thermal excitation of a fixed time and solved for the heat distribution analysis within it by considering the adiabatic boundary conditions and constant initial conditions as described in equation ( 8) (or equations (9)) and (11). The corresponding temperature variation generated on the specimen surface is then recorded and processed with the crosscorrelation based data analysis.…”

“…Inclusions in this alloy have been inspected using various procedures, including optical examination, ultrasonic testing, x-ray imaging, and eddy current testing [8]. These approaches have demonstrated some effectiveness in detecting certain types of inclusions, although they frequently have limits regarding resolution, sensitivity and practicality [1][2][3][4][5][6][7][8][9][10][11].…”

“…IRT offers various advantages, which include non-contact examination, quick inspection, and whole-field inspection. Measuring the thermal sensitivity of a material provides valuable information regarding the existence and nature of inclusions [9][10][11][12][13][14][15]. Pulse Thermography (PT) [16][17][18][19], Lock-in Thermography (LT) [20][21][22], and Pulse Phase Thermography (PPT) [23][24][25][26] are the most widely used traditional active IRT methods.…”

Thermal Method as a Non-Destructive Testing of Thin-Walled Parts

“…Development patterns of dynamic temperature fields allow us to determine the location and the defect size. For this, the unsteady heat conduction inverse problem is solved [7][8][9][10].…”