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Effect of irradiation defects on the plastic slip of {112} grain boundary: atomic scale study

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COMMAT-D-22-00872_R1.pdf (3,986Mb)
 
10.1016/j.commatsci.2022.111739
 
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hdl:2117/374663

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Kvashin, NikolaiMés informacióMés informació
Terentyev, Dimitry
Serra Tort, Ana MaríaMés informacióMés informacióMés informació
Anento Moreno, NapoleónMés informacióMés informació
Document typeArticle
Defense date2022-11
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 4.0 International
This work is protected by the corresponding intellectual and industrial property rights. Except where otherwise noted, its contents are licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 4.0 International
ProjectM4F - MULTISCALE MODELLING FOR FUSION AND FISSION MATERIALS (EC-H2020-755039)
Abstract
S3{112} grain boundary (GB) is known to exhibit plastic slip in bcc metals, which overall contributes to the good ductility and toughness of such metals as iron, matrix element for the steels applied in nuclear industry. During nuclear operation, the neutron irradiation causes formation of point defects and their clusters which lead to the non-equilibrium mass transport and agglomeration of nanoscale defects inside grains and near the grain boundaries. Due to the effect of chemical segregation, GBs can encounter sessile obstacles preventing the GB plastic slip. Understanding the influence of the irradiation defects segregated at the grain boundaries is important for the development of structural steels for nuclear fusion and fission applications. The present paper studies the influence of the irradiation defects, such as Cr precipitates, He bubbles and voids on the plastic slip of the GB interface. The studied defects are found to act as strong obstacles to the glide of the elementary disconnections responsible for the shear-coupled GB migration. The interaction between a single elementary disconnection and a series of them provided by a source has been studied. As a result of the interaction with impenetrable defects the formation of residual defects such as loops is observed.
CitationKvashin, N. [et al.]. Effect of irradiation defects on the plastic slip of {112} grain boundary: atomic scale study. "Computational materials science", Novembre 2022, vol. 214, p. 111739:1-111739:9. 
URIhttp://hdl.handle.net/2117/374663
DOI10.1016/j.commatsci.2022.111739
ISSN0927-0256
Publisher versionhttps://www.sciencedirect.com/science/article/abs/pii/S0927025622004578
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