Determination of hydrogen in low alloy steel by magnetoacoustic emission and Barkhausen noise
This work serves to assess the viability of a nondestructive technique for the determi- nation of hydrogen in steel welds using variation in magnetic properties. To that end, the philosophical framework is established through a review of applicable theories and develop- ment of new models with regard to hydrogen mobility and ferromagnetism, where possible. Experimental methods and analytical algorithms are developed to determine variation in magnetoacoustic and Barkhausen emission character and changes in magnetization behav- ior. These techniques are then applied to a select number of low-alloy ...
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