Characterisation of interfacial segregation to Cu-enriched precipitates in two thermally aged reactor pressure vessel steel welds

• Published in: Ultramicroscopy Vol. 159; pp. 292 - 298
• Main Authors: Styman, P.D., Hyde, J.M., Wilford, K., Parfitt, D., Riddle, N., Smith, G.D.W.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.12.2015
• Subjects: Aging; Atom Probe Tomography; Copper; Cu clustering; Interface segregation; Nickel; Precipitates; Precipitation; Reduction; RPV steels; Segregations; Steels; Thermal ageing; Atom Probe Tomography; Interface segregation; Cu clustering; RPV steels; Thermal ageing

To understand the contribution of long term thermal ageing to Reactor Pressure Vessel (RPV) embrittlement two high Cu steel welds with different Ni contents were thermally aged for times up to 100,000h at 330°C and 365°C. Microstructural characterisation using Atom Probe Tomography was performed. Th...