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In-Situ Observation of Cooperative Grain Boundary Sliding and Migration in the Nano-Twinned Nanocrystalline-Au Thin-Films

18 Pages Posted: 30 Oct 2019 First Look: Accepted

See all articles by Qizhen Li

Qizhen Li

University of Queensland - Materials Engineering

Lihua Wang

Beijing University of Technology - Institute of Microstructure and Property of Advanced Materials

Jiao Teng

University of Science and Technology Beijing - Department of Material Physics and Chemistry

Xiaolu Pang

University of Science and Technology Beijing - Department of Material Physics and Chemistry

Xiaodong Han

Beijing University of Technology - Institute of Microstructure and Property of Advanced Materials

Jin Zou

University of Queensland - Centre for Microscopy and Microanalysis; University of Queensland - Materials Engineering

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-films 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.

Keywords: In-situ, deformation, grain boundary sliding, grain boundary migration, nano-twinned grains

Suggested Citation

Li, Qizhen and Wang, Lihua and Teng, Jiao and Pang, Xiaolu and Han, Xiaodong and Zou, Jin, In-Situ Observation of Cooperative Grain Boundary Sliding and Migration in the Nano-Twinned Nanocrystalline-Au Thin-Films (2019). Available at SSRN: https://ssrn.com/abstract=3474455

Qizhen Li

University of Queensland - Materials Engineering

St. Lucia, QLD 4072
Australia

Lihua Wang

Beijing University of Technology - Institute of Microstructure and Property of Advanced Materials

100 Ping Le Yuan
Chaoyang District
Beijing, Beijing 100020
China

Jiao Teng

University of Science and Technology Beijing - Department of Material Physics and Chemistry

Beijing
China

Xiaolu Pang

University of Science and Technology Beijing - Department of Material Physics and Chemistry

Beijing
China

Xiaodong Han (Contact Author)

Beijing University of Technology - Institute of Microstructure and Property of Advanced Materials ( email )

100 Ping Le Yuan
Chaoyang District
Beijing, Beijing 100020
China

Jin Zou

University of Queensland - Centre for Microscopy and Microanalysis ( email )

Australia

University of Queensland - Materials Engineering ( email )

St. Lucia, QLD 4072
Australia

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