Evaluation of High Spatial Resolution Imaging of Magnetic Stray Fields for Early Damage Detection

被引：4

作者：

Stegemann, Robert ^{[1
]}

Cabeza, Sandra ^{[1
]}

Pelkner, Matthias ^{[1
]}

Lyamkin, Viktor ^{[1
]}

Sonntag, Nadja ^{[1
]}

Bruno, Giovanni ^{[1
]}

Skrotzki, Birgit ^{[1
]}

Kreutzbruck, Marc ^{[1
,2
]}

机构：

[1] Bundesanstalt Mat Forsch & Prufung BAM, Unter Eichen 87, D-12200 Berlin, Germany

[2] Univ Stuttgart, IKT, Pfaffenwaldring 32, D-70569 Stuttgart, Germany

来源：

43RD REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION | 2017年 / 1806卷

关键词：

PLASTIC-DEFORMATION; RESIDUAL-STRESS;

D O I：

10.1063/1.4974688

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The paper discusses the evaluation of elastic and plastic strain states in two low-carbon steels of the same steel group with high spatial resolution GMR (giant magneto resistance) sensors. The residual stress distributions of tungsten inert gas welded plates were determined by means of neutron diffraction as a reference. The normal component of local residual magnetic stray fields arise in the vicinity of the positions of maximum stress. The experiments performed on flat tensile specimen indicate that the boundaries of plastic deformations are a source of stray fields. The spatial variations of magnetic stray fields for both the weld and the tensile samples are in the order of the earths magnetic field.

引用

页数：10

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