The Role of Some Alloying Elements on Radiation Hardening in Pressure Vessel Steels

2009 ◽  
pp. 63-63-12 ◽  
Author(s):  
N Igata ◽  
K Watanabe ◽  
S Sato
Keyword(s):  
Pressure Vessel ◽  
Radiation Hardening ◽  
Alloying Elements ◽  
Pressure Vessel Steels

Carbon analysis in reactor pressure vessel steels

1983 ◽  
Vol 41 ◽  
pp. 222-223
Author(s):  
O.C. de Hodgins ◽  
B.L. Shriver ◽  
K.R. Lawless
Keyword(s):  
Carbon Atom ◽  
Pressure Vessel ◽  
Radiation Sensitivity ◽  
Carbon Activity ◽  
Transmission Electron ◽  
Pressure Vessel Steels ◽  
Finite Distance ◽  
Iron Ferrite ◽  
Substitutional Atom

The effect of neutron irradiation on the notch ductility transition temperature (NDTT) of A533B steel is known to be affected by the activity of the carbon atom which would be affected by its nearest neighboring substitutional atom, that is, silicon, manganese, etc. The high carbon activity resulting from increased nickel and silicon promotes the formation of vacancy complexes which produce irradiation hardening and, therefore, higher NDTT shifts.The present study has been undertaken to clarify the role of carbon and impurities in A533-B steel in the mechanism of neutron embrittlement, two specimens of A533-B pressure vessel steels differing in radiation sensitivity have been examined using transmission electron microscopy. The study showed that the carbon-vacancy complex in iron (ferrite) has a carbon atom positioned a finite distance from the vacancy along a <100> line. In some cases martensite was found, in others, a combination of martensite with ferrite.

Mossbauer Study of the Role of Aluminum and Chromium in Nitrogen Implanted Iron

1991 ◽  
Vol 235 ◽  
Author(s):  
M. Kopcewicz ◽  
J. Jagielski ◽  
A. Turos ◽  
D. L. Williamson
Keyword(s):  
Thermal Stability ◽  
Ion Implantation ◽  
Metallic Iron ◽  
Conversion Electron ◽  
Alloying Elements ◽  
Mössbauer Study ◽  
Conversion Electron Mössbauer Spectroscopy ◽  
Conversion Electron Mossbauer Spectroscopy ◽  
Thermal Stability Of

ABSTRACTThe role of alloying elements such as Cr and Al in the formation and stability of the nitride phases formed due to N ion implantation into metallic iron was studied by conversion electron Mössbauer spectroscopy (CEMS). The thermal stability of nitride phases upon 1 h annealing was greatly increased as a result of co-implanting either Cr or Al with N as compared to pure α-Fe implanted only with N.

Sign in / Sign up

Export Citation Format

Share Document