Loading...
Determination of hydrogen in low alloy steel by magnetoacoustic emission and Barkhausen noise
Poncelow, Jonathan A.
Poncelow, Jonathan A.
Citations
Altmetric:
Editor
Date
Date Issued
2017
Date Submitted
Collections
Research Projects
Organizational Units
Journal Issue
Embargo Expires
2019-01-03
Abstract
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 steel samples varied in microstructure by heat treatment and hydrogen concentration by electrolytic charging. Results of these tests are interpreted in the context of hydrogen trapping in ferrous metals and the impact of the solute on the ferromagnetic properties and magnetization dynamics of steel. Finally, the methods developed are evaluated for their robustness as nondestructive methods for hydrogen characterization in field and/or laboratory environments.
Associated Publications
Rights
Copyright of the original work is retained by the author.