Inhibition of Grain Coarsening in Nanocrystalline Fe-C Alloys by Interaction between Carbon and Grain Boundaries

• DOI: 10.4028/www.scientific.net/amr.904.184
• Publication Date: 2014-03-12T14:24:11Z
• Authors: Yu Zeng Chen; A. Herz; Christine Borchers; X.H. Shi; X.Y. Ma; F. Liu; Reiner Kirchheim
• Keywords: Nanocrystalline material; Grain boundary strengthening

Nanocrystalline Fe-1.77at.%C and Fe-3.27at.%C alloys prepared by ball milling iron powders graphite are annealed below 573K where the precipitation of Fe 3 C does not occur. Upon annealing, a significant grain coarsening is observed in alloy, whereas inhibited alloy. Within framework thermodynamic theories, inhibition nanocrystalline Fe-C discussed. It demonstrated that can be ascribed to vanished driving force for growth which caused interaction between carbon boundaries nanograins.