STAINLESS-STEEL OUTGASSING DUE TO DEFORMATION

In the course of experimentation with uhv systems it was observed that there was outgassing of the metal sample caused purely by deformation without action of another body. At first a stainless steel bellows wa s used to study this phenomenon. Further investigation was carried out with a device consisting of a metal tube connected to a vacuum system . The other end of the tube was rotated through a chosen angle and the acting moment of forces, angular displacement and the response of the vacuum system were registered. It was found that the gas release occu rred only if the limit of elasticity was exceeded. The amount of gas r eleased increased with increasing deformation and also with increasing temperature. The exposure of the inner surface to gas at higher press ure had no measurable effect for H-2, O-2, H2O and CO. Displacement of dissolved gas due to changes in structure and volume of deformed mate rial is suggested as the cause of this phenomenon.