Skip to Main content Skip to Navigation
New interface
Journal articles

On the interaction of solutes with grain boundaries

Abstract : Solute segregation to grain boundaries is considered by modeling solute atoms as misfitting inclusions within a disclination structural unit model describing the grain boundary structure and its intrinsic stress field. The solute distribution around grain boundaries is described through Fermi-Dirac statistics of site occupancy. The susceptibility of hydrogen segregation to symmetric tilt grain boundaries is discussed in terms of the misorientation angle, the defect type characteristics at the grain boundary, temperature, and the prescribed bulk hydrogen fraction of occupied sites. Through this formalism, it is found that hydrogen trapping on grain boundaries clearly correlates with the grain boundary structure (i.e. type of structural unit composing the grain boundary), and the associated grain boundary misorientation. Specifically, for symmetric tilt grain boundaries about the [0 0 1] axis, grain boundaries composed of both B and C structural units show a lower segregation susceptibility than other grain boundaries. A direct correlation between the segregation susceptibility and the intrinsic net defect density is provided through the Frank-Bilby formalism. Overall, the present formulation could prove to be a simple and useful model to identify classes of grain boundaries relevant to grain boundary engineering.
Document type :
Journal articles
Complete list of metadata
Contributor : LEM3 UL Connect in order to contact the contributor
Submitted on : Thursday, April 27, 2017 - 9:59:05 AM
Last modification on : Friday, August 5, 2022 - 2:54:00 PM

Intranet access



Remi Dingreville, Stéphane Berbenni. On the interaction of solutes with grain boundaries. Acta Materialia, 2016, 104, pp.237-249. ⟨10.1016/j.actamat.2015.11.017⟩. ⟨hal-01515201⟩



Record views