Temperature dependence in Bragg edge neutron transmission measurements

被引：9

作者：

Al-Falahat, Ala'a M. ^{[1
,2
,3
]}

Kardjilov, Nikolay ^{[1
]}

Woracek, Robin ^{[4
,5
]}

Boin, Mirko ^{[1
]}

Markoetter, Henning ^{[1
,3
,6
]}

Kuhn, Luise Theil ^{[7
]}

Makowska, Malgorzata ^{[2
]}

Strobl, Markus ^{[5
,8
,9
]}

Pfretzschner, Beate ^{[6
]}

Banhart, John ^{[1
,3
]}

Manke, Ingo ^{[1
]}

机构：

[1] Blelmholtz Zentrum Berlin Mat & Energie, Hahn Meitner Pl 1, D-14109 Berlin, Germany

[2] Mutah Univ, Fac Engn, Mech Engn Dept, POB 7, Al Karak 61710, Jordan

[3] Tech Univ Berlin, Str 17 Juni 135, D-10623 Berlin, Germany

[4] European Spallat Source ERIC, POB 176, S-22100 Lund, Sweden

[5] CAZ, Nucl Phys Inst, Prague, Czech Republic

[6] Bundesanstalt Mat Forsch & Prufung BAM, Unter Eichen 87, D-12205 Berlin, Germany

[7] Tech Univ Denmark, Dept Energy Convers & Storage, Fys Vej B310, DK-2000 Lyngby, Denmark

[8] Paul Scherrer Inst, WBBA 119, CH-5232 Villigen, Switzerland

[9] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

来源：

JOURNAL OF APPLIED CRYSTALLOGRAPHY | 2022年 / 55卷

关键词：

neutron Bragg edge imaging; Debye-Waller factor; temperature-dependent neutron transmission; super martensitic stainless steel; IMAGING INSTRUMENT; IN-SITU; TRANSFORMATION; DIFFRACTION; STRAIN; DECOMPOSITION; SCATTERING; MODULUS; STRESS; SIZE;

D O I：

10.1107/S1600576722006549

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：919 / 928

页数：10

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