Abstract
The technique of Single Sensor Differential Thermal Analysis (SS DTA) has been subjected to series of verification experiments. Its accuracy and sensitivity to various phase transformations and structural changes has been evaluated by comparison to the classic differential thermal analysis (DTA) and to dilatometric analysis (DA). The reliability of thermocouple and SS DTA measurements in the typical ranges of heat treatment and weld heating rates has been estimated utilizing the endothermic effect of the ferromagnetic to paramagnetic transition and the Curie temperature as a reference point. The sensitivity of SS DTA to various phase transformations and structural changes has been demonstrated by in-situ applications during fusion and solid-state welding, casting, heat treatment and post weld heat treatment (PWHT). Its application range includes construction of continuous cooling transformation (CCT) diagrams, development and testing of processing procedures, weldability studies, development of welding consumables and new alloys.
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