Heavy hydrogen isotopes penetration through austenitic and martensitic steels

Experimental results are presented of deuterium and tritium permeability th rough samples of nickel, austenitic steel (16Cr-15Ni-3Mo-Ti), and martensit ic steel DIN 1.4914 (MANET) exposed to a gaseous phase. Experiments were ca rried out at the RFNC-VNHTF installation, which has the capability of measu ring the permeability of hydrogen isotopes by mass spectrometry over a temp erature range of 293-1000 K, hydrogen isotope pressure ranges of 50-1000 Pa . Sample disks (30 and 40 mm diam.) can be assembled in the test chamber by electron-beam welding or mounted (30mm diam. disks) on gaskets. Diffusion and permeability dependencies on temperature and pressure are determined an d corresponding activation energies are presented. (C) 2000 Elsevier Scienc e B.V. All rights reserved.