Creep deformation behavior of nano oxide dispersion strengthened Fe–18Cr ferritic steel

Materialia ◽  
2020 ◽  
Vol 12 ◽  
pp. 100788 ◽  
Author(s):  
Rajesh Jarugula ◽  
P. Suresh Babu ◽  
S. Ganesh Sundara Raman ◽  
G. Sundararajan
Keyword(s):  
Creep Deformation ◽  
Deformation Behavior ◽  
Ferritic Steel ◽  
Oxide Dispersion Strengthened ◽  
Oxide Dispersion ◽  
Nano Oxide

Development of Oxide Dispersion Strengthened (ODS) Ferritic Steel Through Powder Forging

2017 ◽  
Vol 26 (4) ◽  
pp. 1817-1824 ◽  
Author(s):  
Deepak Kumar ◽  
Ujjwal Prakash ◽  
Vikram V. Dabhade ◽  
K. Laha ◽  
T. Sakthivel
Keyword(s):  
Ferritic Steel ◽  
Oxide Dispersion Strengthened ◽  
Oxide Dispersion

EBSD Study on Processing Domain Parameters of Oxide Dispersion Strengthened 18Cr Ferritic Steel

2018 ◽  
Vol 28 (1) ◽  
pp. 263-272 ◽  
Author(s):  
Manmath Kumar Dash ◽  
S. Saroja ◽  
Rahul John ◽  
R. Mythili ◽  
Arup Dasgupta
Keyword(s):  
Ferritic Steel ◽  
Oxide Dispersion Strengthened ◽  
Oxide Dispersion

scholarly journals Nano-Structured Materials under Irradiation: Oxide Dispersion-Strengthened Steels

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2590
Author(s):  
Joël Ribis ◽  
Isabelle Mouton ◽  
Cédric Baumier ◽  
Aurélie Gentils ◽  
Marie Loyer-Prost ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Ostwald Ripening ◽  
Lattice Structure ◽  
Extreme Environments ◽  
Oxide Dispersion Strengthened ◽  
Oxide Dispersion ◽  
Medium Temperature ◽  
Host Matrix ◽  
Structured Materials ◽  
Nano Oxide

Oxide dispersion-strengthened materials are reinforced by a (Y, Ti, O) nano-oxide dispersion and thus can be considered as nanostructured materials. In this alloy, most of the nanoprecipitates are (Y, Ti, O) nano-oxides exhibiting a Y2Ti2O7 pyrochlore-like structure. However, the lattice structure of the smallest oxides is difficult to determine, but it is likely to be close to the atomic structure of the host matrix. Designed to serve in extreme environments—i.e., a nuclear power plant—the challenge for ODS steels is to preserve the nano-oxide dispersion under irradiation in order to maintain the excellent creep properties of the alloy in the reactor. Under irradiation, the nano-oxides exhibit different behaviour as a function of the temperature. At low temperature, the nano-oxides tend to dissolve owing to the frequent ballistic ejection of the solute atoms. At medium temperature, the thermal diffusion balances the ballistic dissolution, and the nano-oxides display an apparent stability. At high temperature, the nano-oxides start to coarsen, resulting in an increase in their size and a decrease in their number density. If the small nano-oxides coarsen through a radiation-enhanced Ostwald ripening mechanism, some large oxides disappear to the benefit of the small ones through a radiation-induced inverse Ostwald ripening. In conclusion, it is suggested that, under irradiation, the nano-oxide dispersion prevails over dislocations, grain boundaries and free surfaces to remove the point defects created by irradiation.

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