Resolving the morphology of niobium carbonitride nano-precipitates in steel using atom probe tomography.
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Atom probe is a powerful technique for studying the composition of nano-precipitates, but their morphology within the reconstructed data is distorted due to the so-called local magnification effect. A new technique has been developed to mitigate this limitation by characterizing the distribution of the surrounding matrix atoms, rather than those contained within the nano-precipitates themselves. A comprehensive chemical analysis enables further information on size and chemistry to be obtained. The method enables new insight into the morphology and chemistry of niobium carbonitride nano-precipitates within ferrite for a series of Nb-microalloyed ultra-thin cast strip steels. The results are supported by complementary high-resolution transmission electron microscopy.
author list (cited authors)
Breen, A. J., Xie, K. Y., Moody, M. P., Gault, B., Yen, H., Wong, C. C., Cairney, J. M., & Ringer, S. P.
complete list of authors
Breen, Andrew J||Xie, Kelvin Y||Moody, Michael P||Gault, Baptiste||Yen, Hung-Wei||Wong, Christopher C||Cairney, Julie M||Ringer, Simon P