The effects of stress fields and H trapping on H transport were studied in high-strength steels by using the H micro-print technique. The transport of H was shown to be promoted by an applied stress field. The approach described permitted the direct evaluation of H transport, as affected by H trapping and stress fields.

Visualization of Hydrogen Transport in High Strength Steels Affected by Stress Fields and Hydrogen Trapping. A.Nagao, S.Kuramoto, K.Ichitani, M.Kanno: Scripta Materialia, 2001, 45[10], 1227-32