...-granular precipitation in these alloys. In particular, attention has been paid to the carbide population, which exists in the material in addition to the copper precipitates, which have received detailed study elsewhere. The most dramatic revelations concern the discovery that fine, intra-granular (10 nm...

... submerged-arc welds neutron irradiation embrittlement copper precipitation Journal ofASTM Intemational, October 2004, Vol. 1, No. 9 Paper ID JAIl 1315 Available online at www.astm.org J. Brian Hall t and Kenneth K. Yoon I Effect of Stress Relief Time on the Transition Temperature of Linde 80 Welds...

... great, the value of k in the embrittlement equation increased to 2.0 + 0.3(B-1) ± 0.5 for steels containing B weight ppm of natural boron. For a high copper C-Mn-Mo steel, hardening and embrittlement shifts arose due to irradiation-enhanced copper precipitation. Over the thermal dose range examined...

... Microscope examination. After service, one specific control rod was found to have suffered damage to its outer ferritic steel sheath. Using an understanding of the mechanisms for copper precipitation and dislocation loop formation under reactor operating conditions, it was possible to make an estimate...

... the existing radiation embrittlement models to Linde 80 welds. This paper describes the detailed plans for future work. submerged-arc welds neutron irradiation copper precipitation reactor vessel transmission electron microscopy optical microscopy small-angle neutron scattering field-ion...

.... Applying the latter optimised form produced equally good prediction of HSSI results at a significantly higher damage rate demonstrating the “rate effect” inherent in the irradiation enhanced copper precipitation process. The best agreement was obtained assuming a matrix copper content of about 0.23 wt...

... in the RPV Supports, when taken in light of the HFIR results of that time, highlighted the possibility that irradiation induced copper precipitation could occur at the low temperatures (50–600°C) and peak end-of-life dose of 2mdpa, ~1×10 18 n.cm −2 (E>1MeV), encountered in RPV Supports, which contain...

.... Irradiation temperature pressure vessel steels hardening embrittlement copper precipitation R. Barry Jones (1) and Timothy J. Williams (2) THE DEPENDENCE OF RADIATION HARDENING AND EMBRITTLEMENT ON IRRADIATION TEMPERATURE REFERENCE: Jones, R. B. and Williams, T. J., " T h e Dependence of Radiation...

... electron microscopy convergent beam diffraction energy dispersive X-ray technique thin foil technique extraction technique submerged arc weld reactor vessel inclusion copper precipitation carbides Kenneth R. Lawless, l Arthur L. Lowe, Jr. 2 FURTHER MICROSTRUCTURAL METALS - II CHARACTERIZATION...

... or thermal ageing will be discussed. In particular the implications of a potential further mechanism for embrittlement in commercial steels will be considered. Irradiation Embrittlement Pressure Vessel Steels Copper Precipitation Titanium Nitrogen William J. Phythian1, Nieves de Diego2, Jackie...

... The reactor pressure vessel of a pressurized water reactor can be embrittled by neutron irradiation from the core It has been recognized for many years that copper plays a significant role in the embrittlement process and more recently that copper precipitates pin dislocations In developing...

... microscopy convergent beam diffraction energy dispersive X-ray technique thin foil technique extraction technique submerged arc weld reactor vessel inclusion copper precipitation carbides Kenneth R Lawless ~and Arthur L Lowe, Jr. 2 Further Microstructural Characterization of Submerged-Arc Weld...

... dispersive X-ray techniques thin foil techniques extraction techniques submerged arc weld reactor vessels inclusion copper precipitation carbides Kenneth R. Lawless,^ Wayne A. Pavinich,^ and Arthur L. Lowe, Jr? Microstructural Characterization of Submerged Arc Weld Metals REFERENCE: Lawless, K. R...