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Title: The effect of Zr on precipitation in oxide dispersion strengthened FeCrAl alloys

Journal Article · · Journal of Nuclear Materials

Oxide dispersion strengthened (ODS) FeCrAl alloys are promising candidate materials for advanced nuclear reactor applications requiring high-temperature strength, corrosion resistance, and irradiation tolerance. As these alloys have increased in compositional complexity through attempts to use highly reactive elements such as Zr to refine particle sizes and optimize nanoprecipitate dispersion characteristics, much debate has ensued as to the effects of these alloying element additions on alloy properties. In an attempt to reconcile differences in nanoprecipitate distributions reported in the literature over the past decade, a detailed investigation of a recently developed ODS FeCrAl alloy with nominal composition Fe–10Cr-6.1Al-0.3Zr+0.3Y2O3 is presented here using a combination of atom probe tomography (APT), scanning/transmission electron microscopy (S/TEM), and computational thermodynamics modeling. It is illustrated that based on the amount of Zr available in the lattice, Zr competes with Al and Cr to form carbides and nitrides as opposed to oxygen-rich precipitates. This alloy system has a high number density (>1023 m-3) of ~2–4 nm diameter (Y,Al,O)-rich nanoprecipitates, but it is shown that due to the compositional spread and unknown partitioning of Al between the matrix and precipitates, significant challenges still exist for quantifying the exact compositions of these precipitates using APT. However, the noted compositional spread is supported by identified complex oxides yttrium aluminum monoclinic (YAM) and yttrium aluminum garnet (YAG) using S/TEM. As a result of these findings, researchers developing ODS FeCrAl with reactive element additions must pay careful attention to C and N impurities when optimizing reactive element additions.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1651407
Alternate ID(s):
OSTI ID: 1606064
Journal Information:
Journal of Nuclear Materials, Vol. 533, Issue 1; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

References (60)

Correlation of the microstructure and the tensile deformation of incology MA956 journal August 1995
Characterization of the oxide particles in Al-added high-Cr ODS ferritic steels journal October 2011
Formation of Yttrium Aluminum Perovskite and Yttrium Aluminum Garnet by Mechanical Solid-State Reaction journal March 2000
Formation of nanoscale complex oxide particles in mechanically alloyed ferritic steel journal July 2004
On the remarkable thermal stability of nanostructured ferritic alloys journal September 2014
Nanometer scale precipitation in ferritic MA/ODS alloy MA957 journal August 2004
Oxide particle coarsening at temperature over 1473 K in 9CrODS steel journal December 2016
Effect of neutron irradiation on nanoclusters in MA957 ferritic alloys journal November 2011
Structure of oxide nanoparticles in Fe–16Cr MA/ODS ferritic steel journal August 2010
Influence of mechanical alloying and extrusion conditions on the microstructure and tensile properties of Low-Cr ODS FeCrAl alloys journal December 2018
When do oxide precipitates form during consolidation of oxide dispersion strengthened steels? journal December 2016
Aspects of the observation of clusters in the 3-dimensional atom probe journal January 2007
The formation and evolution of oxide particles in oxide-dispersion-strengthened ferritic steels during processing journal April 2013
Quantifying the composition of yttrium and oxygen rich nanoparticles in oxide dispersion strengthened steels journal February 2013
Effects of extrusion temperature on the nano-mesoscopic structure and mechanical properties of an Al-alloyed high-Cr ODS ferritic steel journal October 2011
Advanced oxidation-resistant iron-based alloys for LWR fuel cladding journal May 2014
Effect of Ti and Cr on dispersion, structure and composition of oxide nano-particles in model ODS alloys journal September 2015
Applications of atom-probe tomography to the characterisation of solute behaviours journal July 2010
Experimental artefacts occurring during atom probe tomography analysis of oxide nanoparticles in metallic matrix: Quantification and correction journal August 2017
High temperature oxidation of fuel cladding candidate materials in steam–hydrogen environments journal September 2013
Irradiation creep and swelling from 400 to 600 °C of the oxide dispersion strengthened ferritic alloy MA957 journal August 2004
Development of low-Cr ODS FeCrAl alloys for accident-tolerant fuel cladding journal April 2018
Multiscale investigations of nanoprecipitate nucleation, growth, and coarsening in annealed low-Cr oxide dispersion strengthened FeCrAl powder journal March 2019
A model accounting for spatial overlaps in 3D atom-probe microscopy journal October 2001
Automated Analysis of SEM X-Ray Spectral Images: A Powerful New Microanalysis Tool journal January 2003
Atom probe specimen preparation with a dual beam SEM/FIB miller journal September 2007
Using complimentary microscopy methods to examine Ni-Mn-Si-precipitates in highly-irradiated reactor pressure vessel steels journal August 2017
New insights into the chemical structure of Y2Ti2O7−δ nanoparticles in oxide dispersion-strengthened steels designed for sodium fast reactors by electron energy-loss spectroscopy journal January 2015
Post irradiation examination of nanoprecipitate stability and α′ precipitation in an oxide dispersion strengthened Fe-12Cr-5Al alloy journal March 2019
New Techniques for the Analysis of Fine-Scaled Clustering Phenomena within Atom Probe Tomography (APT) Data journal November 2007
Polymorphic and coherency transition of Y–Al complex oxide particles with extrusion temperature in an Al-alloyed high-Cr oxide dispersion strengthened ferritic steel journal February 2011
Ultra-high temperature tensile properties of ODS steel claddings under severe accident conditions journal April 2017
Nanoscale characterisation of ODS–Eurofer 97 steel: An atom-probe tomography study journal May 2010
An integrated Silicon Drift Detector System for FEI Schottky Field Emission Transmission Electron Microscopes journal July 2009
Effect of H2O and CO2 on the Oxidation Behavior and Durability at High Temperature of ODS-FeCrAl journal February 2013
On the status and prospects for nanostructured ferritic alloys for nuclear fission and fusion application with emphasis on the underlying science journal January 2018
TEM and HRTEM study of oxide particles in an Al-alloyed high-Cr oxide dispersion strengthened ferritic steel with Hf addition journal March 2017
Quantification of oxide particle composition in model oxide dispersion strengthened steel alloys journal December 2015
Core/shell structures of oxygen-rich nanofeatures in oxide-dispersion strengthened Fe–Cr alloys journal November 2008
Irradiation-enhanced α′ precipitation in model FeCrAl alloys journal April 2016
LAMDA: Irradiated-Materials Microscopy at Oak Ridge National Laboratory journal August 2015
Development of ODS FeCrAl for Compatibility in Fusion and Fission Energy Applications journal November 2014
A procedure for quantification of precipitate microstructures from three-dimensional atom probe data journal May 2003
Growth of oxide particles in FeCrAl- oxide dispersion strengthened steels at high temperature journal September 2017
TEM study of PM 2000 steel journal September 2005
TEM and HRTEM study of oxide particles in an Al-alloyed high-Cr oxide dispersion strengthened steel with Zr addition journal January 2014
Phase transformations in yttrium –aluminium oxides in friction stir welded and recrystallised PM2000 alloys journal September 2009
Modelling of phase diagrams and thermodynamic properties using Calphad method – Development of thermodynamic databases journal January 2013
A chemical composition correction model for nanoclusters observed by APT - Application to ODS steel nanoparticles journal July 2018
Influence of processing on the microstructure and mechanical properties of 14YWT journal April 2016
A combined APT and SANS investigation of α′ phase precipitation in neutron-irradiated model FeCrAl alloys journal May 2017
Influences of interstitial and extrusion temperature on grain boundary segregation, Y−Ti−O nanofeatures, and mechanical properties of ferritic steels journal July 2018
Characterization of precipitates in MA/ODS ferritic alloys journal June 2006
Advanced TEM characterization of oxide nanoparticles in ODS Fe–12Cr–5Al alloys journal July 2016
Designing Radiation Resistance in Materials for Fusion Energy journal July 2014
Formation mechanism and the role of nanoparticles in Fe-Cr ODS steels developed for radiation tolerance journal November 2010
Transmission electron microscopy characterization of the nanofeatures in nanostructured ferritic alloy MA957 journal May 2012
α′ precipitation in neutron-irradiated Fe–Cr alloys journal March 2014
Atomic structure of nanoclusters in oxide-dispersion-strengthened steels journal October 2011
Nano-particle precipitation in mechanically alloyed and annealed precursor powders of legacy PM2000 ODS alloy journal September 2015