ABSTRACT Stainless steels are widely used in many fields such as chemical, petrochemical, food and nuclear industries and they are characterized by physical, mechanical and corrosion resistance properties that depend on the microstructure and phase transformations: many intermetallic phases, carbides and nitrides precipitate at different tempering temperatures. In the work hydrogen embrittlement mechanisms were reviewed, focusing the increasing of the fatigue crack growth rate as a function both of the experimental conditions and of the steels microstructure. Sintered stainless steels microstructure influence on fatigue crack propogation both in air and under hydrogen charging condition was investigated, Six different sintered stainless steels were considered and an extensive SEM (scanning electron microscope) fracture surface analysis was performed.
Buy this Article
|