475°C Embrittlement in Stainless Steels [ READ ]
Farej Ahmed Alhegagi
The effect of 475°C embrittlement on the mechanical properties of duplex stainless steels (DSS) was investigated. Specimens of compact tension specimens (CT) were heat treated at 475°C for different times and pulled to failure in air. Hardness was measured and fracture surface was studied for each specimens using optical and scanning electron microscopy. Depends on treatment time results showed that specimen hardness , fracture mode , cracking bath , fracture toughness and the crack length were affected by the treatment at 475°C. An increase in specimens hardness was clearly measured with increasing treatment time at 475°C. The ferrite phase fractured in a brittle manner with more tendency to cleave with increasing treatment time. No intergranular failure was observed for all tested specimens. The austenite phase fractured in a ductile manner, plastic deformation, and showed no effect of heating at 475°C on this phase fracture mechanism.
Farej Ahmed Alhegagi
The effect of 475°C embrittlement on the mechanical properties of duplex stainless steels (DSS) was investigated. Specimens of compact tension specimens (CT) were heat treated at 475°C for different times and pulled to failure in air. Hardness was measured and fracture surface was studied for each specimens using optical and scanning electron microscopy. Depends on treatment time results showed that specimen hardness , fracture mode , cracking bath , fracture toughness and the crack length were affected by the treatment at 475°C. An increase in specimens hardness was clearly measured with increasing treatment time at 475°C. The ferrite phase fractured in a brittle manner with more tendency to cleave with increasing treatment time. No intergranular failure was observed for all tested specimens. The austenite phase fractured in a ductile manner, plastic deformation, and showed no effect of heating at 475°C on this phase fracture mechanism.
