期刊
NATURE COMMUNICATIONS
卷 9, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-06166-5
关键词
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资金
- U.S. DOE at LANL through the LANL LDRD Program [DE-AC52-06NA25396, 20180683ER]
- Institute for Materials Science 2016 Rapid Response program
- Argonne LDRD [2015-149-R1, 2018-019-N0]
- U.S Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- Center for Integrated Nanotechnologies, a U.S. DOE BES user facility
The nucleation and propagation of dislocations is an ubiquitous process that accompanies the plastic deformation of materials. Consequently, following the first visualization of dislocations over 50 years ago with the advent of the first transmission electron microscopes, significant effort has been invested in tailoring material response through defect engineering and control. To accomplish this more effectively, the ability to identify and characterize defect structure and strain following external stimulus is vital. Here, using X-ray Bragg coherent diffraction imaging, we describe the first direct 3D X-ray imaging of the strain field surrounding a line defect within a grain of free-standing nanocrystalline material following tensile loading. By integrating the observed 3D structure into an atomistic model, we show that the measured strain field corresponds to a screw dislocation.
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