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Article
Characterization of Stress Corrosion Cracks in Ni-Based Weld Alloys 52, 52M and 152 Grown in High-Temperature Water
Materials Characterization
  • Yi Xie, Ohio State University
  • Yaqiao Wu, Boise State University
  • Jatuporn Burns, Boise State University
  • Jinsuo Zhang, Ohio State University
Document Type
Article
Publication Date
2-1-2016
Abstract
Ni-based weld alloys 52, 52M and 152 are extensively used in repair and mitigation of primary water stress corrosion cracking (SCC) in nuclear power plants. In the present study, a series of microstructure and microchemistry at the SCC tips of these alloys were examined with scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), scanning transmission electron microscopy (STEM) and energy filtered transmission electron microscopy (EFTEM). The specimens have similar chemical compositions and testing conditions. Intergranular (IG) and transgranular (TG) SCC was observed in all of them. The cracks were filled with nickel-oxides and partial precipitations of chrome carbides (CrCs), niobium carbides (NbCs), titanium nitrides (TiNs) and silicon carbides (SiCs), while iron (Fe) was largely dissolved into the solution. However, the crack densities, lengths and distributions were different for all three specimens.
Citation Information
Xie, Yi; Wu, Yaqiao; Burns; Jatuporn; and Zhang, Jinsuo. (2016). "Characterization of Stress Corrosion Cracks in Ni-Based Weld Alloys 52, 52M and 152 Grown in High-Temperature Water". Materials Characterization, 112, 87-97. http://dx.doi.org/10.1016/j.matchar.2015.12.005