Formation and disintegration investigation of fivefold annealing twins in copper nanoparticles. (August 2019)

• Record Type: Journal Article
• Authors: Deng, Ziliang; Luo, Jun; Yuan, Wenjuan; Xi, Wei
• Is Part Of: Scripta materialia. Number 169(2019)
• Page Start: 42
• Page End: 45
• Publication Date: 2019-08
• Subjects: Fivefold twin -- In-situ TEM -- Cu nanoparticle; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.04.043
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Fivefold annealing twins (FAT) have been assumed to form by grain boundary migration according to the Ashby model. However, the mechanism of boundary migration lacks experimental support. Moreover, the FAT disintegration process has never been reported. In our experiment, the complete formation and disintegration process of FAT in copper nanoparticles was investigated by in-situ transmission electron microscopy with high temporal and spatial resolution. The results show that FAT formation and disintegration arises from the layer-by-layer migration of twin boundaries, induced by partial dislocation emission. This experimental observation is significant to the basic understanding of twinning mechanisms. Graphical abstract: Unlabelled Image