scholarly journals Nano-oxide precipitation kinetics during the consolidation process of a ferritic oxide dispersion strengthened steel.

2020 ◽  
Vol 188 ◽  
pp. 10-15
Author(s):  
Gabriel Spartacus ◽  
Joël Malaplate ◽  
Frédéric De Geuser ◽  
Denis Sornin ◽  
Amélie Gangloff ◽  
...  
Keyword(s):  
Oxide Dispersion Strengthened ◽  
Oxide Dispersion ◽  
Precipitation Kinetics ◽  
Consolidation Process ◽  
Oxide Dispersion Strengthened Steel ◽  
Nano Oxide

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.

Effect of the Initial Powder and Treatment on the Structure of Oxide Dispersion-Strengthened Steel

Atomic Energy ◽  
2014 ◽  
Vol 116 (1) ◽  
pp. 42-47 ◽  
Author(s):  
I. I. Chernov ◽  
M. S. Stal’tsov ◽  
B. A. Kalin ◽  
I. A. Bogachev ◽  
M. A. Burlakova ◽  
...  
Keyword(s):  
Oxide Dispersion Strengthened ◽  
Oxide Dispersion ◽  
Initial Powder ◽  
Oxide Dispersion Strengthened Steel

On the coherency of Y2Ti2O7 particles with austenitic matrix of oxide dispersion strengthened steel

2015 ◽  
Vol 89 ◽  
pp. 141-152 ◽  
Author(s):  
Xiaodong Mao ◽  
Kyu Hwan Oh ◽  
Suk Hoon Kang ◽  
Tae Kyu Kim ◽  
Jinsung Jang
Keyword(s):  
Oxide Dispersion Strengthened ◽  
Oxide Dispersion ◽  
Austenitic Matrix ◽  
Oxide Dispersion Strengthened Steel
Sign in / Sign up

Export Citation Format

Share Document