Soft Magnetic Materials 13

J. Phys. IV France 08 (1998) Pr2-797-Pr2-800
DOI: 10.1051/jp4:19982184

The change of Barkhausen noise due to thermal ageing in Inconel 600

D.G. Park¹, S.S. Kim¹, B.G. Ahn¹, J.H. Hong¹, C.G. Kim², H.C. Kim² and I.S. Kim<sup>3

1</sup>  Korea Atomic Energy Research Institute, Yusung P.O. Box 105, Taejon 305-600, Korea
²  Department of Physics, Sun Moon University, Kalsan-ri, Tangjung-myung, Asan-si, Chung-nam 336-840, Korea
³  Department of Nuclear Engineering, Korea Advanced Institute Science and Technology, 373-1 Kusong-Dong, Yusung-Gu, Taejon 305-701, Korea

Abstract
Barkhausen noise signal was measured as a function of ageing time at various temperatures in Inconel 600 (1600) alloy to evaluate the material state nondestructively. Differential Scanning Calorimetry (DSC) and Transmission Electron Microscopy (TEM) were used to correlate ordering and microstructural change to the observed change of the Barkhausen noise. Three stage Barkhausen noise changes with ageing time at given temperature are explained by the change of anisotropy energy and domain wall pinning conditions due to the formation of Short Range Order (SRO). Long Range Order (LRO) and carbide precipitation, respectively.

© EDP Sciences 1998