Analytical electron microscopy of a selective oxide scale formed on 20% Cr-25% Ni-Nb stainless steel

1984 ◽  
Vol 22 (5-6) ◽  
pp. 291-306 ◽  
Author(s):  
M. J. Bennett ◽  
J. A. Desport ◽  
P. A. Labun
Keyword(s):  
Electron Microscopy ◽  
Stainless Steel ◽  
Oxide Scale ◽  
Analytical Electron Microscopy ◽  
Analytical Electron

Precipitation at α/γ interfaces in duplex stainless steel

1992 ◽  
Vol 50 (1) ◽  
pp. 60-61
Author(s):  
M.G. Burke ◽  
E.A. Kenik
Keyword(s):  
Electron Microscopy ◽  
Stainless Steel ◽  
Grain Boundaries ◽  
Duplex Stainless Steel ◽  
Stainless Steels ◽  
Analytical Electron Microscopy ◽  
Nuclear Industry ◽  
Temperature Range ◽  
Α Phase ◽  
Analytical Electron

Duplex (austenite/ferrite) stainless steels are used in a variety of applications in the nuclear industry, particularly for coolant pipes, valves and pumps. These materials may become embrittled after prolonged ageing in the temperature range ∼350 - 550°C due to precipitation of G-phase, an FCC-based Ni silicide, and the formation of a Cr-rich α' phase in the ferrite. In addition to the intragranular G-phase precipitates, preferential precipitation of other phases is often observed at grain boundaries, particularly α/γ interfaces. In this examination, the precipitates formed in a Nb-containing duplex stainless steel have been identified using analytical electron microscopy.

Analytical electron microscopy of a selective oxide scale formed on 20%Cr/25%Ni/niobium stabilized stainless steel

1984 ◽  
Vol 42 ◽  
pp. 616-617
Author(s):  
M.J. Bennett ◽  
J.A. Desport ◽  
P.A. Labun
Keyword(s):  
Stainless Steel ◽  
Oxide Scale ◽  
Selective Oxidation ◽  
Nuclear Power ◽  
Power Plants ◽  
Analytical Electron Microscopy ◽  
Annealing Treatment ◽  
Scale Thickness ◽  
Analytical Electron ◽  
Steel Surfaces

In the United Kingdon commercial advanced gas cooled nuclear power plants the fuel cladding is a 20%Cr/25%Ni/0.7%Mn/0.7%Si/Nb stabilised (20/25/Nb) austenitic stainless steel and the coolant is CO2 based. Protection of the 20/25/Nb steel surfaces can be enhanced by selective oxidation, which ensures that a Cr-rich oxide scale covers the steel surface. The selective oxidation procedure developed was compatible with the required metallurgical annealing treatment and consisted of a lh heat treatment at 930°C in 50:1 H2/H2O. Weight gain measurements indicated that the average scale thickness was 0.5 micron.Electron transparent transverse specimens of selectively oxidised 20/25/Nb steel were produced and the microstructure and chemical composition of the selective oxide scale was investigated by AEM techniques.

scholarly journals Precipitation and “Sensitization” of Type 304L Stainless Steel: Correlation of the ASTM A262 Practice A Test with Analytical Electron Microscopy

2011 ◽  
Vol 17 (S2) ◽  
pp. 1020-1021
Author(s):  
B Miller ◽  
M Burke
Keyword(s):  
Electron Microscopy ◽  
Stainless Steel ◽  
Analytical Electron Microscopy ◽  
304L Stainless Steel ◽  
Analytical Electron

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.

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