Hardening induced by dislocation core spreading at disordered interface in Cu/Nb multilayers. (15th July 2021)

• Record Type: Journal Article
• Authors: Yang, Wenfan; Gong, Mingyu; Yao, Jiahao; Wang, Jiangwei; Zheng, Shijian; Ma, Xiuliang
• Is Part Of: Scripta materialia. Number 200(2021)
• Publication Date: 2021-07-15
• Subjects: Multilayer -- Interface -- Hardness -- Disorder -- Dislocation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2021.113917
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Atomistic scale interface structures could tailor the dislocation behaviors at interface, as well as interface strengthening. In this work, we design a disordered interface by introducing an ultrathin amorphous layer in the Cu/Nb multilayers. Compared to the sharp interface, the disordered interface can smear the impinging dislocation with relaxing the in-plane and out-of-plane Burgers vectors, thus inducing a remarkable hardening in the Cu/Nb multilayers. The findings not only prove the hardening effect induced by dislocation interface smearing, but also shed light on developing advanced materials with ultrahigh hardness via disordered interface. Graphical abstract: Image, graphical abstract