Detection of Magnetomechanical Effect in Structural Steel Using GMR 2nd Order Gradiometer Based Sensors

被引：5

作者：

Bonavolonta, Carmela ^{[1
]}

Valentino, Massimo ^{[1
,2
]}

Penta, Francesco ^{[3
]}

Granata, Carmine ^{[2
,4
]}

Ruggiero, Berardo ^{[2
]}

Silvestrini, Paolo ^{[2
,4
]}

Vettoliere, Antonio ^{[2
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy

[2] CNR, Ist Sci Applicate & Sistemi Intelligenti, I-80078 Pozzuoli, Italy

[3] Univ Naples Federico II, Dept Ind Engn, I-80125 Naples, Italy

[4] Univ Campania L Vanvitelli, Dept Math & Phys, I-81100 Caserta, Italy

来源：

SENSORS | 2019年 / 19卷 / 19期

关键词：

magneto-mechanical effects; non-destructive testing of materials; GMR devices; PLASTIC-DEFORMATION; NONDESTRUCTIVE EVALUATION; MAGNETIC-PROPERTIES; RESIDUAL-STRESS; MAGNETOSTRICTION; DISLOCATIONS;

D O I：

10.3390/s19194147

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The magneto-mechanical behaviour of structural steel specimens stressed up to the plastic deformation stage was investigated using a 2nd order gradiometer based on Giant Magneto Resistive (GMR) sensors. The correlation between the gradient of the magnetization and the dislocation density before the crack initiation inside the test material was reported. The capability of the GMR scanning sensor to detect the residual magnetization due to the tensile stress with a non-invasive technique was demonstrated.

引用

页数：10

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