Temperature dependence in Bragg edge neutron transmission measurements
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Standard
Temperature dependence in Bragg edge neutron transmission measurements. / Al-Falahat, Ala'a M.; Kardjilov, Nikolay; Woracek, Robin; Boin, Mirko; Markoetter, Henning; Kuhn, Luise Theil; Makowska, Malgorzata; Strobl, Markus; Pfretzschner, Beate; Banhart, John; Manke, Ingo.
I: Journal of Applied Crystallography, Bind 55, 02.08.2022, s. 919-928.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Temperature dependence in Bragg edge neutron transmission measurements
AU - Al-Falahat, Ala'a M.
AU - Kardjilov, Nikolay
AU - Woracek, Robin
AU - Boin, Mirko
AU - Markoetter, Henning
AU - Kuhn, Luise Theil
AU - Makowska, Malgorzata
AU - Strobl, Markus
AU - Pfretzschner, Beate
AU - Banhart, John
AU - Manke, Ingo
PY - 2022/8/2
Y1 - 2022/8/2
N2 - A systematic study has been carried out to investigate the neutron transmission signal as a function of sample temperature. In particular, the experimentally determined wavelength-dependent neutron attenuation spectra for a martensitic steel at temperatures ranging from 21 to 700 degrees C are compared with simulated data. A theoretical description that includes the Debye-Waller factor in order to describe the temperature influence on the neutron cross sections was implemented in the nxsPlotter software and used for the simulations. The analysis of the attenuation coefficients at varying temperatures shows that the missing contributions due to elastic and inelastic scattering can be clearly distinguished: while the elastically scattered intensities decrease with higher temperatures, the inelastically scattered intensities increase, and the two can be separated from each other by analysing unique sharp features in the form of Bragg edges. This study presents the first systematic approach to quantify this effect and can serve as a basis , for example, to correct measurements taken during in situ heat treatments, in many cases being a prerequisite for obtaining quantifiable results.
AB - A systematic study has been carried out to investigate the neutron transmission signal as a function of sample temperature. In particular, the experimentally determined wavelength-dependent neutron attenuation spectra for a martensitic steel at temperatures ranging from 21 to 700 degrees C are compared with simulated data. A theoretical description that includes the Debye-Waller factor in order to describe the temperature influence on the neutron cross sections was implemented in the nxsPlotter software and used for the simulations. The analysis of the attenuation coefficients at varying temperatures shows that the missing contributions due to elastic and inelastic scattering can be clearly distinguished: while the elastically scattered intensities decrease with higher temperatures, the inelastically scattered intensities increase, and the two can be separated from each other by analysing unique sharp features in the form of Bragg edges. This study presents the first systematic approach to quantify this effect and can serve as a basis , for example, to correct measurements taken during in situ heat treatments, in many cases being a prerequisite for obtaining quantifiable results.
KW - neutron Bragg edge imaging
KW - Debye-Waller factor
KW - temperature-dependent neutron transmission
KW - super martensitic stainless steel
KW - IMAGING INSTRUMENT
KW - IN-SITU
KW - TRANSFORMATION
KW - DIFFRACTION
KW - STRAIN
KW - DECOMPOSITION
KW - SCATTERING
KW - MODULUS
KW - STRESS
KW - SIZE
U2 - 10.1107/S1600576722006549
DO - 10.1107/S1600576722006549
M3 - Journal article
C2 - 35974731
VL - 55
SP - 919
EP - 928
JO - Journal of Applied Crystallography
JF - Journal of Applied Crystallography
SN - 0021-8898
ER -
ID: 317362271