Microstructural changes and fracture behavior of CF8M duplex stainless steels after long-term aging

Effect of 475°C embrittlement on the mechanical properties of duplex stainless steel

“…Similar atom probe field ion microscopy studies on CF series of cast alloys also had been performed [1,20], and the morphology, size distribution and chemical concentration profile of the ␣ precipitates have been determined. The studies on the cast alloys revealed that the phase boundary carbides played a significant role in thermal embrittlement at temperatures greater than 400 • C, but has insignificant effect on the embrittlement at exposure temperatures less than 400 • C [52].…”

“…Duplex stainless steel (DSS) is finding increased applications as structural material in critical components of nuclear power plants [1][2][3][4], chemical industries [5,6], oil and gas sectors [7,8], paper and pulp industries [9,10], transportation [11] and other general engineering applications because of higher strength, superior resistance to stress corrosion cracking and better weldability [12]. The excellent combination of mechanical properties and corrosion resistance of duplex stainless steel is obtained from balanced amount of ferrite and austenite in the microstructure.…”

Thermal ageing on the deformation and fracture mechanisms of a duplex stainless steel by quasi in-situ tensile test under OM and SEM

“…However, CDSSs are subjected to thermal aging embrittlement (TAE) during long-term service at its working temperature from 288 to 327°C. Many literatures have revealed that TAE is mainly associated with the spinodal decomposition in ferrite phase for long-term aging [1,2,[4][5][6][7][8]. It is reported that the mechanical properties of CDSSs steels are dependent on their chemical composition and the volume fractions of each phase [8][9][10][11].…”

“…Researches show that TAE occurs in Z3CN20-09M CDSSs after long term service [4][5][6][7][8]10,[18][19][20]. However, seldom papers focus on the influence of the long thermal ageing time on the deformation behavior and fracture mechanism of Z3CN20-09M CDSSs.…”

Corrosion Versus Mechanical Tests for Indirect Detection of Alpha Prime Phase in UNS S32520 Super Duplex Stainless Steel

“…This is because of the much larger propor- sion electron microscope. [24][25] Only two phases can be seen-the ferrite phase, which corresponds to the dark phase and the austenite phase, which corresponds to the white one. Both phases are aligned to the rolling direction in the observed surface.…”