P G H Pistorius and G T Van Rooyen 1991 Meas. Sci. Technol. 2 1220 doi:10.1088/0957-0233/2/12/022
P G H Pistorius and G T Van Rooyen
Show affiliationsA number of techniques are available to detect the transformation of the body-centred cubic phase (ferrite) to the face-centred cubic phase (austenite), and vice versa, in steels. These methods require the use of sophisticated measuring techniques. It was discovered that the electric potential generated at a dissimilar metal junction (the thermoelectric potential) is sensitive to the phase composition of the two metals forming the dissimilar junction. Using a simple electrical circuit it was possible to utilize this principle to detect phase transformations in a high chromium steel specimen during heat treatment. This is an elegant and novel technique to detect phase transformations in all cases where a temperature gradient exists across a specimen. A symmetrical temperature distribution along the length of specimen is not necessary for the success of this method.
64.70.K- Solid–solid transitions
Issue 12 (December 1991)
P G H Pistorius and G T Van Rooyen 1991 Meas. Sci. Technol. 2 1220
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