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Residual Stress Measurements in Front of a Crack Tip with High Spatial Resolution by Using Barkhausen Microscopy

 

Green, R.E.:
Nondestructive Characterization of Materials VIII
New York: Plenum Press, 1998
ISBN: 0-306-45900-0
S.659-664
International Symposium on Nondestructive Characterization of Materials <8, 1997, Boulder/Colo.>
Englisch
Konferenzbeitrag
Fraunhofer IZFP ()
Barkhausen microscopy; Barkhausen-Mikroskopie; Eigenspannungsmessung; high resolution; hochauflösend; nondestructive testing; residual stress; stress analysis

Abstract
A good correlation was found between residual stress valued at the crack tip obtained with micromagnetic and X-ray measurements; respectively. For the first time quantitative results on residual stress propagation and distribution of plastic deformations in front of a crack tip of pre-stressed specimens were obtained nondestructively, with high local resolution, and wihtin a very short measuring times. However, the measuring results presented here have to be supported statistically by further research with a larger population of specimens.

: http://publica.fraunhofer.de/dokumente/PX-31803.html