Nondestructive detection of dislocations in steel using a SQUID gradiometer

被引：25

作者：

Kasai, N

Ishikawa, N

Yamakawa, H

Chinone, K

Nakayama, S

Odawara, A

机构：

[1] SHIMIZU CORP,TOKYO 135,JAPAN

[2] SEIKO INSTR INC,MATSUDO,CHIBA,JAPAN

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1997年 / 7卷 / 02期

关键词：

D O I：

10.1109/77.621702

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：

We have developed a magnetic flux imaging system. Magnetic flux image (MFI) shows the distribution of magnetic flux density over plate like specimen. The change of the pattern in the MFI by the tensile deformation has been investigated in a carbon steel without applying magnetic field using the system. A clear striped pattern appeared after deformation of the fine plastic strain between 0.2 and 1.0% before strain-hardening. Luders bands, which are groups of slip bands, appeared on the plate surface and were observed at the corresponding locations of the stripes in the MFIs. This shows that the fine deformation is nondestructively detected using the MFI.

引用

页码：2315 / 2318

页数：4