High-throughput characterization phase transformation temperature based on end-quenching methodology

In metallic materials, phase transformation temperature is a critically important physical parameter, yet, in most cases is difficult to be measured in situ and full scale. In past decades, the measurement of phase transformation temperature primarily relies on the differential thermal analysis (DTA) and dilatometry analysis (DA) techniques. Recently, Single sensor DTA technique has been successfully developed to measure transformation starting and finishing temperatures based on one measured curve. In this research, we developed a method to generate a wide range of cooling rate within an individual nickel base superalloy specimen on the basis of end-quenching methodology. By means of recording the cooling history at different specimen positions, three different cooling curves were obtained and the self-developed code can clearly recognize the phase transformation starting and finishing temperatures. This method provides a promising means to measure continuous cooling transformation curve in a rapid and economic manner. (paper)