Interstitial Segregation has the Potential to Mitigate Liquid Metal Embrittlement in Iron.
grain boundary embrittlement
grain boundary segregation
liquid metals
nanoscale segregation patterns
zinc
Journal
Advanced materials (Deerfield Beach, Fla.)
ISSN: 1521-4095
Titre abrégé: Adv Mater
Pays: Germany
ID NLM: 9885358
Informations de publication
Date de publication:
Jul 2023
Jul 2023
Historique:
revised:
17
03
2023
received:
16
12
2022
medline:
17
7
2023
pubmed:
9
4
2023
entrez:
8
4
2023
Statut:
ppublish
Résumé
The embrittlement of metallic alloys by liquid metals leads to catastrophic material failure and severely impacts their structural integrity. The weakening of grain boundaries (GBs) by the ingress of liquid metal and preceding segregation in the solid are thought to promote early fracture. However, the potential of balancing between the segregation of cohesion-enhancing interstitial solutes and embrittling elements inducing GB de-cohesion is not understood. Here, the mechanisms of how boron segregation mitigates the detrimental effects of the prime embrittler, zinc, in a Σ5 [001] tilt GB in α-Fe (4 at.% Al) is unveiled. Zinc forms nanoscale segregation patterns inducing structurally and compositionally complex GB states. Ab initio simulations reveal that boron hinders zinc segregation and compensates for the zinc-induced loss in GB cohesion. The work sheds new light on how interstitial solutes intimately modify GBs, thereby opening pathways to use them as dopants for preventing disastrous material failure.
Identifiants
pubmed: 37030971
doi: 10.1002/adma.202211796
doi:
Substances chimiques
Iron
E1UOL152H7
Boron
N9E3X5056Q
Metals
0
Zinc
J41CSQ7QDS
Alloys
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e2211796Subventions
Organisme : COMET program
ID : 886385
Organisme : Austrian Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology (BMK)
Organisme : Austrian Federal Ministry for Digital and Economic Affairs (BMDW)
Organisme : Austrian Research Promotion Agency (FFG)
Organisme : Federal states of Styria, Upper Austria and Tyrol
Organisme : Alexander Humboldt Stiftung
Organisme : German Research Foundation (DFG)
ID : DA1655/2-1
Organisme : German Research Foundation (DFG)
ID : DA1655/3-1
Organisme : ERC Advanced Grant GB-Correlate
ID : 787446
Informations de copyright
© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.
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