Thermoelectric non-destructive texture characterization in Ti-6Al-4V

In situ strained Inconel 718 superalloy studied by thermoelectric power technique

“…Moreover, TEP of those phases seems to be affected proportionally during the elastic and plastic zones. Anisotropic effects on TEP have been reported in other materials [6,18].…”

“…Despite the model simplicity, from the application point of view, with this model seems to be possible to predict the level of strain knowing the TEP for the SDP of the Inconel 718 studied or predict the TEP when the alloy is deformed. This should be a very attractive application in the aerospace industry if these experiments are carried out with an in situ TEP apparatus, like the apparatus used by Carreon [6], leading to a non destructive test of characterization of pieces under service, providing valuable information that could save huge amount of costs due to reprocessing of distorted parts.…”

“…Thermoelectric power (TEP) technique can be considered as a non-destructive characterization technique depending of the equipment arrangement [6,7]. TEP effect is achieved when two junctions of two metals are brought to two different temperatures; then an electromotive force appears between these two junctions [8].…”

“…Moreover, microstructural changes have been successfully studied by TEP technique in ELC steels [15], 6061 Aluminium [16] and Al-Mg-Si alloy [17]. Finally the anisotropic phenomena of variants orientation in TiNi shape memory alloy has been analysed also by TEP [6,18].…”

Characterisation of solution annealed VT-14 titanium alloy using eddy current based electrical resistivity measurements

“…for assessment of degradation in microstructure, corrosion and fatigue damage. Use of ultrasonic, eddy current (EC), non-linear ultrasonic, thermography, photo acoustic techniques and thermoelectric power measurements has been reported for assessment of microstructures, mechanical properties, plastic deformation and fatigue damage in titanium alloys [7][8][9][10]. NDE techniques are based on physical principles and in these techniques, the interaction of a medium (like electromagnetic radiation and sound waves) with various attributes present in a material are studied to establish a quantitative relationship between NDE parameters and a material attribute of interest.…”