Pulsed Eddy Current Technique for Testing of Stainless Steel Plates

被引：1
作者：
Rao, K. Sambasiva [1 ]
Jayakumar, T. [1 ]
Sekhar, A. Chandra [2 ]
Rao, B. Purnachandra [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Met & Mat Grp, Kalpakkam 603102, TN, India
[2] Chosun Univ, Dept Control Instrumentat & Robot Engn, Kwangju 501759, South Korea
来源：
ELECTROMAGNETIC NONDESTRUCTIVE EVALUATION (XVII) | 2014年 / 39卷
关键词：
Pulsed eddy current; sensors; covered steel objects; imaging; CURRENT DIFFERENTIAL PROBE; CURRENT NDT; FLAWS;
D O I：
10.3233/978-1-61499-407-7-36
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Pulsed eddy current (PEC) technique is attractive for detection of surface defects and wall-thinning in covered electrically conductive materials. This paper discusses development of PEC technique and two different types of self-nulling probes ( differential Hall sensors and Double-D differential coils) for detection of surface notches in a thick stainless steel plate. PEC testing of covered objects is attempted. In this regard, the influence of lift-off on the PEC signal due to insulation shims and thin aluminum layer is studied using the peak amplitude and the performance of the two probes is compared. The results showed that the PEC instrument, probes and scanner developed can be used for detection as well as imaging of defects in stainless steel plates covered with insulation.
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收藏
页码：36 / 43
页数：8
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