Combined effect of interstitial-substitutional elements on dislocation dynamics in nitrogen-added austenitic stainless steels.

ABSTRACT: Combined addition of interstitial-substitutional elements has been acknowledged to contribute to the increase in the strengths of steels. For further improvements in mechanical properties, their atomic-scale interaction mechanisms with dislocations are required to be examined. In this study, both high-resolution transmission electron microscopy and atom-probe tomography were used to correlate interstitial-substitutional elements with dislocation characteristics in austenitic stainless steels. Three types of dislocation core structures are identified and associated with their strain fields as well as N and Cr atoms in the N-added steels. It is revealed that N atoms interact elastically with the dislocations, followed by the segregation of Cr atoms via the chemical interaction between N and

SUBMITTER: Kawahara Y 

PROVIDER: S-EPMC10883984 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature