naa a22 4500 510770053 CHVBK 20180411083210.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11837-013-0603-6 doi (NATIONALLICENCE)springer-10.1007/s11837-013-0603-6 Abnormal Nitride Morphologies upon Nitriding Iron-Based Substrates [Elektronische Daten] [Sai Meka, Eric Mittemeijer] Nitriding of iron-based components is a very well-known surface engineering method for bringing about great improvement of the mechanical and chemical properties. An overview is presented of the strikingly different nitride morphologies developing upon nitriding iron-based alloy substrates. Observed abnormal morphologies are the result of intricate interplay of the thermodynamic and kinetic constraints for the nucleation and growth of both alloying element nitride particles in the matrix and iron nitrides at the surface of the substrate. Alloying elements having strong Me-N interaction, such as Cr, V, and Ti, precipitate instantaneously as internal Me-nitrides, thus allowing the subsequent nucleation and growth of "normal” layer-type iron nitride. Alloying elements having weak Me-N interaction, such as Al, Si, and Mo, and simultaneously having low solubility in iron nitride, obstruct/delay the nucleation and growth of iron nitrides at the surface, thus leading to very high nitrogen supersaturation over an extended depth range from the surface. Eventually, the nucleation and growth of "abnormal” plate-type iron nitride occurs across the depth range of high nitrogen supersaturation. On this basis, strategies can be devised for tuned development of specific nitride morphologies at the surface of nitrided components. TMS, 2013 Meka Sai Max Planck Institute for Intelligent Systems (Formerly Max Planck Institute for Metals Research), Heisenbergstrasse 3, 70569, Stuttgart, Germany aut Mittemeijer Eric Max Planck Institute for Intelligent Systems (Formerly Max Planck Institute for Metals Research), Heisenbergstrasse 3, 70569, Stuttgart, Germany aut JOM Springer US; http://www.springer-ny.com 65/6(2013-06-01), 769-775 1047-4838 65:6<769 2013 65 11837 https://doi.org/10.1007/s11837-013-0603-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11837-013-0603-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Meka Sai Max Planck Institute for Intelligent Systems (Formerly Max Planck Institute for Metals Research), Heisenbergstrasse 3, 70569, Stuttgart, Germany aut NATIONALLICENCE 700 1- Mittemeijer Eric Max Planck Institute for Intelligent Systems (Formerly Max Planck Institute for Metals Research), Heisenbergstrasse 3, 70569, Stuttgart, Germany aut NATIONALLICENCE 773 0- JOM Springer US; http://www.springer-ny.com 65/6(2013-06-01), 769-775 1047-4838 65:6<769 2013 65 11837 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer