Investigation of Artificial Cracks by Scanning SQUID Magnetic Microscope

被引：2

作者：

Adamo, M. ^{[1
,2
]}

Bonavolonta, C. ^{[3
]}

Valentino, M. ^{[3
]}

Sarnelli, E. ^{[2
]}

机构：

[1] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy

[2] CNR Ist Cibernet E Caianiello, I-80078 Pozzuoli, Na, Italy

[3] CNR INFM Coherentia, I-80125 Naples, Italy

来源：

SENSOR LETTERS | 2009年 / 7卷 / 03期

关键词：

Eddy-Current; Non-Destructive Evaluation (NDE); Scanning Magnetic Microscope (SMM); HTc dc SQUID Magnetometer;

D O I：

10.1166/sl.2009.1051

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We have investigated deep defects in structural Al-Ti alloy planar samples used in aeronautical application, by means of eddy current Non-Destructive Evaluation (NDE). The experimental system is a Scanning Magnetic Microscope (SMM) equipped with a high-critical temperature (HTc) dc Superconducting Quantum Interference Device (SQUID) magnetometer characterized by field sensitivity of 20 pT/(Hz)(1/2) and spatial resolution of about 50 mu m. We have detected cracks several millimeters below the surface, keeping relatively high spatial resolution. By mapping the magnetic field distribution, we can localize the sub-surface crack position. The experimental results confirm that this system could be used to detect defects with high resolution for the modeling of fatigue cracks in structures of aeronautical interest.

引用

页码：397 / 399

页数：3

共 8 条

[1] Detection of plastic deformation in structural steel using scanning SQUID microscopy [J].

Bonavolonta, C. ;

Valentino, M. ;

Adamo, M. ;

Sarnelli, E. .

MEASUREMENT SCIENCE AND TECHNOLOGY, 2007, 18 (07) :2116-2120

[2]

CLARKE J, NATO ASI SERIES E, V329, P1

[3] SQUIDs for nondestructive evaluation [J].

Jenks, WG ;

Sadeghi, SSH ;

Wikswo, JP .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1997, 30 (03) :293-323

[4] Recent developments in SQUID NDE [J].

Krause, HJ ;

Von Kreutzbruck, M .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2002, 368 (1-4) :70-79

[5]

Kreutzbruck M.v., 2002, PHYSICA C, V368, P85

[6]

Valentino M, 1999, STUD APPL ELECTROMAG, V15, P159

[7]

Wikswo J. P. Jr., 1993, Journal of Nondestructive Evaluation, V12, P109, DOI 10.1007/BF00567567

[8] SQUID MAGNETOMETERS FOR BIOMAGNETISM AND NONDESTRUCTIVE TESTING - IMPORTANT QUESTIONS AND INITIAL ANSWERS [J].

WIKSWO, JP .

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1995, 5 (02) :74-120

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