Fast neutron surface strain scanning with high spatial resolution

被引：5
|
作者：
Kornmeier, J. Rebelo [1 ]
Hofmann, M. [1 ]
Luzin, V. [2 ,3 ]
Gibmeier, J. [4 ]
Saroun, J. [5 ]
机构：
[1] Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, D-85478 Garching, Germany
[2] ANSTO, Lucas Heights, NSW 2234, Australia
[3] Univ Newcastle, Sch Engn, Callaghan, NSW 2308, Australia
[4] KIT, IAM, D-76131 Karlsruhe, Germany
[5] Nucl Phys Inst CAS, Vvi, Rez 25068, Czech Republic
来源：
MATERIALS CHARACTERIZATION | 2019年 / 154卷
关键词：
Surface strain scans; High spatial resolution; Neutron diffraction; RESIDUAL-STRESSES; DIFFRACTION; MONOCHROMATOR; INSTRUMENT; REACTOR;
D O I：
10.1016/j.matchar.2019.05.031
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A method for near-surface strain scanning measurements using neutron diffraction with large gauge volumes is described. The approach corrects for pseudo (spurious) strains related to partially illuminated gauge volumes and enables deconvolution of the large gauge volume measurements into the assumed real profile. It was validated against X-ray and neutron diffraction experiments with very high spatial resolution. The analysis of the results shows that neutron diffraction based strain measurements with standard (or large) sized gauge volumes are possible to reproduce the real strain profile free of artificial effects related to partial illumination. Compared to measurements with smaller gauge volumes gains in counting time of up to a factor of fifteen can be achieved without appreciable loss in spatial resolution.
引用
收藏
页码：53 / 60
页数：8
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