ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The effect of mechanical stress on Barkhausen noise from 45-permalloy plate is reportedfor as-rolled plate and plates which are annealed at various temperatures up to 1000 K. The data arecompared with data of magnetic permeability, coercive force and Vickers hardness. TheBarkhausen noise energy detected has been found to increase linearly with nominal stress. Thelarger the annealing temperature, the less the rate of increase was observed. On the other hand, themagnetic permeability has been found to decrease linearly with nominal stress in a small stressregion. Overall features are explained qualitatively by a model in which tensile stress makes thenumber of effective pinning sites which have appropriate activation energies for discontinuousmotion of domain wall more, while annealing process makes just the number of pinning sites suchas defects and grain boundaries less
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.385-387.357.pdf