title: Corrosion Product Film-Induced Stress Facilitates Stress Corrosion Cracking.
abstract: Finite element analyses were conducted to clarify the role of corrosion product films (CPFs) in stress corrosion cracking (SCC). Flat and U-shaped edge-notched specimens were investigated in terms of the CPF-induced stress in the metallic substrate and the stress in the CPF. For a U-shaped edge-notched specimen, the stress field in front of the notch tip is affected by the Young's modulus of the CPF and the CPF thickness and notch geometry. The CPF-induced tensile stress in the metallic substrate is superimposed on the applied load to increase the crack tip strain and facilitate localized plasticity deformation. In addition, the stress in the CPF surface contributes to the rupture of the CPFs. The results provide physical insights into the role of CPFs in SCC.
authors.affiliation: Corrosion and Protection Centre, Key Laboratory for Environmental Fracture (MOE), University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Wenwen
authors.initials: W
authors.lastname: Wang
authors.affiliation: Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Richard Birkelands vei 1a, N-7491 Trondheim, Norway.
authors.forename: Zhiliang
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Corrosion and Protection Centre, Key Laboratory for Environmental Fracture (MOE), University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Xuechong
authors.initials: X
authors.lastname: Ren
authors.affiliation: Beijing Institute of Aeronautical Materials, Beijing 100095, China.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Guan
authors.affiliation: Corrosion and Protection Centre, Key Laboratory for Environmental Fracture (MOE), University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Yanjing
authors.initials: Y
authors.lastname: Su