In-situ observation of cooperative grain boundary sliding and migration in the nano-twinned nanocrystalline-Au thin-films. (15th April 2020)

• Record Type: Journal Article
• Authors: Li, Qizhen; Wang, Lihua; Teng, Jiao; Pang, Xiaolu; Han, Xiaodong; Zou, Jin
• Is Part Of: Scripta materialia. Number 180(2020)
• Page Start: 97
• Page End: 102
• Publication Date: 2020-04-15
• Subjects: In-situ -- Deformation -- Grain boundary sliding -- Grain boundary migration -- Nano-twinned grains; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.01.025
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Using our homemade tensile device inside a transmission electron microscope, we in-situ investigated the deformation behaviours of the nano-twinned nanocrystalline Au thin-films with thickness of ~15 nm and average grain size of ~16 nm. Our extensive in-situ observation studies reveal that the deformation of the nano-twinned nanocrystalline Au thin-film was dominated by the cooperative grain boundary sliding and migration, which were rarely observed in the previous reports. Meanwhile, our statistic shows that the nano-twins tended to promote further stress-driven grain growth, and the promotion became more remarkable for the nano-twinned grains that were located at the crack tips. Graphical abstract: Image, graphical abstract