Tritium transmission electron microscopic autoradiography of hydrogen trapping sites at interfaces in an austenitic stainless steel SUS316L

Abstract

Behavior of hydrogen in an austenitic stainless steel SUS316L was investigated by tritium transmission electron microscopic autoradiography. Distribution of silver grains in the autoradiograph obtained by the β-rays emitted from tritium in the specimen indicated that hydrogen was trapped by defects and precipitates in grain boundaries or at triple lines where three boundaries met.