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Title: Three-dimensional X-ray diffraction imaging of dislocations in polycrystalline metals under tensile loading

Abstract

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.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [2];  [3]; ORCiD logo [3];  [3];  [3];  [2];  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source. Center for Nanoscale Materials
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); 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
OSTI Identifier:
1469410
Alternate Identifier(s):
OSTI ID: 1475362; OSTI ID: 1477502
Report Number(s):
LA-UR-18-28692
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
AC52-06NA25396; AC02-06CH11357
Resource Type:
Journal Article: Published Article
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Coherent x-ray imaging; strain imaging

Citation Formats

Cherukara, Mathew J., Pokharel, Reeju, O’Leary, Timothy S., Baldwin, J. Kevin, Maxey, Evan, Cha, Wonsuk, Maser, Jorg, Harder, Ross J., Fensin, Saryu J., and Sandberg, Richard L. Three-dimensional X-ray diffraction imaging of dislocations in polycrystalline metals under tensile loading. United States: N. p., 2018. Web. doi:10.1038/s41467-018-06166-5.
Cherukara, Mathew J., Pokharel, Reeju, O’Leary, Timothy S., Baldwin, J. Kevin, Maxey, Evan, Cha, Wonsuk, Maser, Jorg, Harder, Ross J., Fensin, Saryu J., & Sandberg, Richard L. Three-dimensional X-ray diffraction imaging of dislocations in polycrystalline metals under tensile loading. United States. doi:10.1038/s41467-018-06166-5.
Cherukara, Mathew J., Pokharel, Reeju, O’Leary, Timothy S., Baldwin, J. Kevin, Maxey, Evan, Cha, Wonsuk, Maser, Jorg, Harder, Ross J., Fensin, Saryu J., and Sandberg, Richard L. Mon . "Three-dimensional X-ray diffraction imaging of dislocations in polycrystalline metals under tensile loading". United States. doi:10.1038/s41467-018-06166-5.
@article{osti_1469410,
title = {Three-dimensional X-ray diffraction imaging of dislocations in polycrystalline metals under tensile loading},
author = {Cherukara, Mathew J. and Pokharel, Reeju and O’Leary, Timothy S. and Baldwin, J. Kevin and Maxey, Evan and Cha, Wonsuk and Maser, Jorg and Harder, Ross J. and Fensin, Saryu J. and Sandberg, Richard L.},
abstractNote = {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.},
doi = {10.1038/s41467-018-06166-5},
journal = {Nature Communications},
issn = {2041-1723},
number = ,
volume = 9,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1038/s41467-018-06166-5

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Figures / Tables:

Fig. 1 Fig. 1: Coherent X-ray diffraction imaging in Bragg geometry. Focused coherent X-ray pulses are incident on the polycrystalline Cu sample. Diffracted X-ray pulses are recorded in the far-field by an ASI Timepix detector. The three-dimensional speckle pattern at the (111) Bragg peak is recorded from 2-D diffraction slices obtained bymore » rocking the sample stage through small angles (~10)« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.