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Separation of XRD peak profiles in single-phase metals with bimodal grain structure to analyze stress partitioning

Sjögren, Elis LU orcid ; Pantleon, Wolfgang ; Ahadi, Aylin LU ; Hegedüs, Zoltan ; Lienert, Ulrich ; Tsuji, Nobuhiro ; Ameyama, Kei and Orlov, Dmytro LU orcid (2022) 42nd Risø International Symposium on Materials Science In IOP Conference Series: Materials Science and Engineering 1249.
Abstract
Materials with bimodal grain size distributions have an attractive combination of strength and ductility. Harmonic structure materials are a category of bimodal-structure materials with a specific microstructure design. The deformation mechanisms of such novel materials during the early stages of deformation are not well understood. Thus, we deformed nickel with harmonic structure in tension until a true strain of 0.04 while recording powder diffraction patterns with high-energy synchrotron X-rays. Line profile analysis based on such data enables quantification of stress states and lattice defect densities in different phases in multi-phase materials. Bimodal size distributions in single-phase materials add extra complexity due to the... (More)
Materials with bimodal grain size distributions have an attractive combination of strength and ductility. Harmonic structure materials are a category of bimodal-structure materials with a specific microstructure design. The deformation mechanisms of such novel materials during the early stages of deformation are not well understood. Thus, we deformed nickel with harmonic structure in tension until a true strain of 0.04 while recording powder diffraction patterns with high-energy synchrotron X-rays. Line profile analysis based on such data enables quantification of stress states and lattice defect densities in different phases in multi-phase materials. Bimodal size distributions in single-phase materials add extra complexity due to the absence of differences in composition and crystal structure causing the diffraction peaks from fine and coarse grains to appear at the same diffraction angles. Therefore, prior to any meaningful line profile analysis, the respective diffraction profiles need to be separated. A general method for automatically separating profiles originating from different grain fractions in bimodal materials is presented in this work. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
42nd Risø International Symposium on Materials Science: Microstructural variability: Processing, analysis, mechanisms and properties : 5–9 September 2022, Department of Civil and Mechanical Engineering, Technical University of Denmark, Denmark - 5–9 September 2022, Department of Civil and Mechanical Engineering, Technical University of Denmark, Denmark
series title
IOP Conference Series: Materials Science and Engineering
volume
1249
pages
6 pages
publisher
IOP Publishing
conference name
42nd Risø International Symposium on Materials Science
conference location
Risø, Denmark
conference dates
2022-09-05 - 2022-09-09
ISSN
1757-899X
DOI
10.1088/1757-899x/1249/1/012040
project
Topological control of microstructures for advanced material engineering
Microstructure design in metallic materials using deformation processing based techniques
Studying Deformation and Fracture in Heterogeneous 3D-Architectured Material Microstructures
language
English
LU publication?
yes
id
8f24f6b5-e095-40f9-865e-f681dc7b3c04
date added to LUP
2022-08-26 20:38:45
date last changed
2022-11-09 02:41:43
@inproceedings{8f24f6b5-e095-40f9-865e-f681dc7b3c04,
  abstract     = {{Materials with bimodal grain size distributions have an attractive combination of strength and ductility. Harmonic structure materials are a category of bimodal-structure materials with a specific microstructure design. The deformation mechanisms of such novel materials during the early stages of deformation are not well understood. Thus, we deformed nickel with harmonic structure in tension until a true strain of 0.04 while recording powder diffraction patterns with high-energy synchrotron X-rays. Line profile analysis based on such data enables quantification of stress states and lattice defect densities in different phases in multi-phase materials. Bimodal size distributions in single-phase materials add extra complexity due to the absence of differences in composition and crystal structure causing the diffraction peaks from fine and coarse grains to appear at the same diffraction angles. Therefore, prior to any meaningful line profile analysis, the respective diffraction profiles need to be separated. A general method for automatically separating profiles originating from different grain fractions in bimodal materials is presented in this work.}},
  author       = {{Sjögren, Elis and Pantleon, Wolfgang and Ahadi, Aylin and Hegedüs, Zoltan and Lienert, Ulrich and Tsuji, Nobuhiro and Ameyama, Kei and Orlov, Dmytro}},
  booktitle    = {{42nd Risø International Symposium on Materials Science: Microstructural variability: Processing, analysis, mechanisms and properties : 5–9 September 2022, Department of Civil and Mechanical Engineering, Technical University of Denmark, Denmark}},
  issn         = {{1757-899X}},
  language     = {{eng}},
  month        = {{07}},
  publisher    = {{IOP Publishing}},
  series       = {{IOP Conference Series: Materials Science and Engineering}},
  title        = {{Separation of XRD peak profiles in single-phase metals with bimodal grain structure to analyze stress partitioning}},
  url          = {{http://dx.doi.org/10.1088/1757-899x/1249/1/012040}},
  doi          = {{10.1088/1757-899x/1249/1/012040}},
  volume       = {{1249}},
  year         = {{2022}},
}