Title :
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
fDate :
3/1/2001 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
