The influence of laser scribing on magnetic domain formation in grain oriented electrical steel visualized by directional neutron dark-field imaging.

摘要: The performance and degree of efficiency transformers are directly determined by the bulk magnetic properties grain oriented electrical steel laminations. core losses can be improved post manufacturing methods, so-called domain refinement techniques. All these methods induce mechanical or thermal stress that refines structure. most commonly used technique is laser scribing due to no-contact nature ease integration in existing production systems. Here we show how directional neutron dark-field imaging allows visualizing impact on supplementary In particular, investigate formation during magnetization samples depending treatment parameters such as energy line distances. findings were quantitatively interpreted context with global hysteresis measurements. Especially exploit orientation sensitivity images distinguish between different structures alignment their relation process.