TY  - CONF
AU  - Sjögren-Levin, E.
AU  - Pantleon, Wolfgang
AU  - Ahadi, A.
AU  - Hegedüs, Z.
AU  - Lienert, U.
AU  - Tsuji, N.
AU  - Ameyama, K.
AU  - Orlov, D.
TI  - Separation of XRD peak profiles in single-phase metals with bimodal grain structure to analyze stress partitioning
JO  - IOP conference series / Materials science and engineering
VL  - 1249
IS  - 1
SN  - 1757-8981
CY  - London [u.a.]
PB  - Institute of Physics
M1  - PUBDB-2022-04439
SP  - 012040
PY  - 2022
AB  - 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.
T2  - 42nd Risø International Symposium on Materials Science Microstructural variability: Processing, analysis, mechanisms and properties
CY  - 5 Sep 2022 - 9 Sep 2022, Roskilde (Denmark)
Y2  - 5 Sep 2022 - 9 Sep 2022
M2  - Roskilde, Denmark
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
DO  - DOI:10.1088/1757-899X/1249/1/012040
UR  - https://bib-pubdb1.desy.de/record/481544
ER  -