In Situ Observation of Twin Boundary Sliding in Single Crystalline Cu Nanowires

Using a homemade, novel, in situ transmission electron microscopy (TEM) double tilt tensile device, plastic behavior of single crystalline Cu nanowires of around 150 nm are studied. Deformation twins occur during the tests as predesigned before the experiments. In situ observation of twin boundary s...

Full description

Saved in:
Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2017-07, Vol.13 (25), p.n/a
Main Authors: Yue, Yonghai, Zhang, Qi, Zhang, Xuejiao, Yang, Zhenyu, Yin, Penggang, Guo, Lin
Format: Article
Language:English
Subjects:
Crystal structure
Deformation
Deformation mechanisms
Dislocations
Electrons
in situ
Microstructure
Migration
Molecular dynamics
Nanomaterials
Nanotechnology
Nanowires
Necking
single crystalline Cu nanowires
Sliding
Strain
Transmission electron microscopy
twin boundary sliding
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Using a homemade, novel, in situ transmission electron microscopy (TEM) double tilt tensile device, plastic behavior of single crystalline Cu nanowires of around 150 nm are studied. Deformation twins occur during the tests as predesigned before the experiments. In situ observation of twin boundary sliding (TBS) caused by full dislocation (extended dislocation) is first revealed at the atomic scale which is confirmed by molecular dynamics (MD) simulation results. Combined with twin boundary migration and multiple dislocations nucleated from surface, TBS causes a superlarge fracture strain which is over 166% and a severe necking which is over 93%, far beyond the typical values for most nanomaterials without twins. In situ observation of twin boundary sliding (TBS) caused by full dislocation (extended dislocation) is first revealed at the atomic scale. Combined with twin boundary migration and multiple dislocations nucleated from the surface, TBS causes a fracture strain of ≈166% and a severe necking of ≈93%, far beyond the typical values for most nanomaterials without twins.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.201604296