Effects of hydrogen clusters on interface facilitated plasticity at semi-coherent bimetal interfaces. (1st January 2021)

• Record Type: Journal Article
• Authors: Wang, C.J.; Liu, Z.R.; Yao, B.N.; Kong, X.F.; Legut, D.; Zhang, R.F.; Deng, Y.
• Is Part Of: Scripta materialia. Number 190(2021)
• Page Start: 63
• Page End: 68
• Publication Date: 2021-01-01
• Subjects: Hydrogen cluster -- Semi-coherent interface -- Dislocation nucleation -- Interface sliding; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.08.031
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Dislocation nucleation and interface sliding are two dominant plasticity events governing the mechanical behavior of metallic nanocomposites. Recent works have shown that both events can be closely related to atomistic interface geometries, however, how compositional factors, e.g., segregated hydrogen clusters, contribute both events are nearly unknown. Herein, we demonstrate that hydrogen clusters near misfit dislocation nodes can strongly suppress dislocation nucleation and interface sliding, while clusters at other positions will contribute somehow weaker effect on dislocation nucleation but facilitate interface sliding. These findings offer a rational atomistic mechanism for the effect of hydrogen clusters on interface facilitated plasticity. Graphical abstract: Image, graphical abstract