In situ observation of stress induced grain boundary migration in nanocrystalline gold. (June 2017)

• Record Type: Journal Article
• Authors: Wang, Lihua; Xin, Tianjiao; Kong, Deli; Shu, Xinyu; Chen, Yanhui; Zhou, Hao; Teng, Jiao; Zhang, Ze; Zou, Jin; Han, Xiaodong
• Is Part Of: Scripta materialia. Number 134(2017)
• Page Start: 95
• Page End: 99
• Publication Date: 2017-06
• Subjects: Plastic deformation -- Grain boundary migration -- Nanocrystalline metal -- In situ -- Transmission electron microscopy (TEM); Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.03.003
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: In this study, the plastic behaviors of nanocrystalline Au with an average grain size of 18 nm were investigated in situ using a home-made tensile device in a transmission electron microscope. We provide the direct experimental results revealed the process of grain boundary migration. The results show that dislocation behaviors are prevalent for large grains. However, for grain sizes below ~ 15 nm, grain boundary migration occurs frequently. The results of our statistical analyses show that grain boundary migration occurs more frequently than grain boundary sliding and rotation in nanocrystalline Au. Graphical abstract: