Effect of Surface Processing on Hydrogen Desorption from Stainless Steel to UHV

Abstract

  Electron Stimulated Desorption (ESD) is one of surface analysis techniques using an excitation of adsorbed atoms by electrons. Using a scanning electron beam it is possible to map a two dimensional ESD distribution of adsorbed hydrogen. We detected striped pattern of hydrogen desorption from the stainless steel surface flattened by the processing with the lathe. The hydrogen gas was supplied to backside of the sample membrane, penetrates the sample inside, and arrives at the surface. The ESD pattern of hydrogen reflects density of the dislocation in martensite that occurred by lathe processing on the austenite steel surface.