Abstract
Effect of Ferrite on the Precipitation of σ Phase in Cast Austenitic Stainless Steel Used for Primary Coolant Pipes of Nuclear Power Plants
Highlights
Cast austenitic stainless steels (CASS), which are characterized by the dual phase microstructure in which the island α-ferrite phase distributes in the γ-austenite matrix, possess excellent synthesis mechanical properties, good workability and high resistance to localized corrosion in chloride environments[1,2,3,4]
Ferrite phase may be one of important factors for the σ precipitation in stainless steels especially for cast austenitic stainless steel (CASS) with a dual phase microstructure that less ferrite phases distribute in austenite matrix
The precipitation behavior of σ phase in a Z3CN20.09M CASS used for primary coolant pipe of nuclear power plants with different volume and morphology ferrite was investigated
Summary
Cast austenitic stainless steels (CASS), which are characterized by the dual phase microstructure in which the island α-ferrite phase distributes in the γ-austenite matrix, possess excellent synthesis mechanical properties, good workability and high resistance to localized corrosion in chloride environments[1,2,3,4]. They are widely used in the primary coolant pipes of nuclear power plants and other engineering applications such as oil, chemical petrochemical, marine industries.
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