The Effect of High Temperature Liquid Sodium on Mechanical Properties and Microstructure of Ferritic-Martensitic Steel

A study was carried out to investigate the effect of liquid sodium on the microstructural and mechanical property of ferritic-martensitic steel used for cladding material of sodium-cooled fast reactor (SFR). This study deals with the corrosion processes such as metal loss and selective leaching of metals and alloys that influence the mechanical behavior. Study was carried out to assess the microstructural and mechanical properties of ferritic-martensitic steel under a flow sodium environment. ASTM a192 Gr.92 steel was exposed to liquid sodium at 650 .deg. C for 1583 hand 3095 h, and evaluations of the microstructure as well as the mechanical properties of the ring hoop tensile tests were conducted. The objective of this study is to evaluate properties such as microstructure and mechanical property of the ferritic-martensitic steel which exposed to high temperature sodium environment. Ferritic-martensitic steel was exposed to the liquid sodium for a certain time and the ring hoop tensile test was then evaluated