Three-dimensional X-ray diffraction imaging of dislocations in polycrystalline metals under tensile loading
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.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); LANL Laboratory Directed Research and Development (LDRD) Program; ANL Laboratory Directed Research and Development (LDRD) Program; Los Alamos National Laboratory (LANL), Laboratory Directed Research and Development (LDRL); Argonne National Laboratory, Laboratory Directed Research and Development (LDRD); Argonne National Laboratory, Center for Nanoscale Materials
- Grant/Contract Number:
- AC52-06NA25396; AC02-06CH11357
- OSTI ID:
- 1469410
- Alternate ID(s):
- OSTI ID: 1475362; OSTI ID: 1477502
- Report Number(s):
- LA-UR-18-28692; 3776; PII: 6166
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Vol. 9 Journal Issue: 1; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
Web of Science
Similar Records
Accurate, rapid identification of dislocation lines in coherent diffractive imaging via a min-max optimization formulation
Three-dimensional atomic structure and local chemical order of medium- and high-entropy nanoalloys