Evaluation of Hydrogen Resistance of 18Mn-18Cr Stainless Steels andits Welding Joining by Fracture Mechanics Approaches

摘要

For definition of critical moment of state in gaseous hydrogen, which prevents thernfracture (durability closing) of retaining ring unit made from 18Mn-18Cr the stress intensityrnfactor (SIF) at plane-strain fracture K1(a,σ ) I has used. The critical state is consider such, whenrnon the crack contour the maximum SIF value achieves the fracture toughness K1c in hydrogen.