|article dans une revue internationale avec comité de lecture|
|Niclaeys Christophe; Nguyen Thai Ha; Marie Stéphane; Chapuliot Stéphane; Degallaix Suzanne|
|Engineering Fracture Mechanics (Eng Fract Mech)|
|149 – 166|
|This paper evaluates the brittle fracture risk for a C-Mn weld in the upper shelf of the brittle-to-ductile transition: the criterion considered is based on a critical stress σth, with the failure probability related to the volume around the crack where the maximum principal stress exceeds σth.
The weld shows a complex microstructure with two types of melted zone. SEM observations showed that the main cleavage sites are located in the coarse grain zone, near an inclusion. In test analyses, the material’s heterogeneity in the weld metal is considered to estimate local fields at the weld pass scale.
|brittle to ductile fracture transition; weld joint; SEM; piping system|