Abstract

Steels belong to one of the best established materials, however, the mechanisms of various phase transformations down to the nano length scale are still not fully clear. In this work, high-resolution transmission electron microscopy is combined with atomistic simulations to study the nanoscale carbide precipitation in a Fe–Cr–C alloy. We identify a cooperative growth mechanism that connects host lattice reconstruction and interstitial segregation at the growing interface front, which leads to a preferential growth of cementite (Fe3C) nanoprecipitates along a particular direction. This insight significantly improves our understanding of the mechanisms of nanoscale precipitation in interstitial alloys, and paves the way for engineering nanostructures to enhance the mechanical performance of alloys.

Details

Title
Interface dominated cooperative nanoprecipitation in interstitial alloys
Author
Wang, Hongcai 1 ; Xie, Zhang 2   VIAFID ORCID Logo  ; Dingshun Yan 3 ; Somsen, Christoph 1 ; Eggeler, Gunther 1 

1  Institut für Werkstoffe, Ruhr-Universität Bochum, Bochum, Germany 
2  Materials Department, University of California, Santa Barbara, CA, USA 
3  Institute of Mechanics, Chinese Academy of Sciences, Beijing, China 
Pages
1-7
Publication year
2018
Publication date
Oct 2018
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41467-018-06474-w
ProQuest document ID
2115240074
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.