Abstract
The carbon concentration profile at a ferrite/martensite interface in an Fe-C alloy was measured by EDS in an analytical TEM equipped with an ultra-thin window (UTW) intrinsic Ge (HPGe) detector. While a carbon signal was visible with electron energy loss spectroscopy, quantification to obtain a concentration profile was not possible, and for this light-element analysis, EDS analysis is superior. Annealing this quenched sample caused carbide precipitation, whose spatial distribution correlated well with the EDS measurements of the concentration profile.
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