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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Wang H,Zhang X,Yan D,Somsen C,Eggeler Gdoi
10.1038/s41467-018-06474-wsubject
Has Abstractpub_date
2018-10-01 00:00:00pages
4017issue
1issn
2041-1723pii
10.1038/s41467-018-06474-wjournal_volume
9pub_type
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