Treatment of spatial resolution effects in neutron residual strain scanning

被引：9

作者：

Saroun, Jan ^{[1
]}

Rebelo-Kornmeier, Joana ^{[2
]}

Gibmeier, Jens ^{[3
]}

Hofmann, Michael ^{[2
]}

机构：

[1] Nucl Phys Inst CAS, Vvi, Rez 25068, Czech Republic

[2] Tech Univ Munich, ZWE FRM 2, Lichtenbergstr 1, D-85747 Garching, Germany

[3] Karlsruhe Inst Technol, Inst Appl Mat, Kaiserstr 12, D-76131 Karlsruhe, Germany

来源：

PHYSICA B-CONDENSED MATTER | 2018年 / 551卷

关键词：

Residual strain; Neutron diffraction; Pseudo strain; Resolution; GAUGE VOLUME; PEAK SHIFT;

D O I：

10.1016/j.physb.2018.01.013

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A semi-empirical method for treatment of spatial resolution effects in neutron strain scanning is proposed. The method is based on the description of neutron sampling volume as a Gaussian function perturbed by sample boundaries and other material heterogeneities. This approach results in a simple analytical model with a small number of free parameters, which can be determined from measured diffraction intensities and/or by neutron ray-tracing simulation, therefore no extra calibration measurements are necessary. Suitability of the method for treatment of pseudo strains arising near sample boundaries as well as due to strain gradients is demonstrated on the 4-point bending experiment with a ferritic steel sample of fine grained construction steel type S690QL.

引用

页码：468 / 471

页数：4

共 9 条

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[3]

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