%0 conference paper,conference lecture %@ %A Anuschewski, W.,Dietzel, W.,Horstmann, M.,Pfuff, M.,Wellenkoetter, B. %D 1990 %J Hydrogen effects on material behaviour: Proceedings of the Fourth International Conference on the Effect of Hydrogen on the Behaviour of Materials %N %P 929-937 %T AC potential measurement of hydrogen-induced geometrical crack closure during fatigue crack growth %U %X