Detection of plastic deformation gradients in steel using scanning SQUID microscopy

Author

Clatterbuck, D.M. ; Lee, Tae-Kyu ; Shaw, T.J. ; Heinig, N.F. ; Cho, Hsiao-Mei ; Clarke, John ; Morris, J.W., Jr.

Author_Institution

Center for Adv. Mater., Lawrence Berkeley Lab., CA, USA

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

1307

Lastpage

1310

Abstract

Scanning SQUID microscopy is shown to be capable of detecting deformation gradients when accompanied by significant changes in hardness. Deformation which does not increase the dislocation density (as measured by the increase in hardness) has little effect. The effect can be produced by different techniques including cold rolling and tensile deformation. The effect is shown to occur in at least two different alloys with very different microstructures indicating the possibility of wide applicability

Keywords

SQUIDs; cold rolling; dislocation density; ferromagnetic materials; hardness; microscopy; nondestructive testing; plastic deformation; steel; cold rolling; dislocation density; ferromagnetic alloy; hardness; magnetic NDE; microstructure; plastic deformation gradient detection; scanning SQUID microscopy; steel; tensile deformation; Crystalline materials; Magnetic domain walls; Magnetic force microscopy; Magnetic materials; Magnetic properties; Magnetization; Microstructure; Plastics; SQUIDs; Steel;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919590

Filename

919590