Atom probe tomography of the evolution of the nanostructure of oxide dispersion strengthened steels under ion irradiation

2017 ◽  
Vol 2017 (9) ◽  
pp. 741-747 ◽  
Author(s):  
N. N. Orlov ◽  
S. V. Rogozhkin ◽  
A. A. Bogachev ◽  
O. A. Korchuganova ◽  
A. A. Nikitin ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Ion Irradiation ◽  
Oxide Dispersion Strengthened ◽  
Atom Probe ◽  
Oxide Dispersion

scholarly journals Electron microscopy and atom probe tomography of nanoindentation deformation in oxide dispersion strengthened steels

2020 ◽  
Vol 167 ◽  
pp. 110477
Author(s):  
Thomas P. Davis ◽  
Jack C. Haley ◽  
Sarah Connolly ◽  
Maria A. Auger ◽  
Michael J. Gorley ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Atom Probe Tomography ◽  
Oxide Dispersion Strengthened ◽  
Atom Probe ◽  
Oxide Dispersion

Study of Nano-cluster Formation in Fe-18Cr ODS Ferritic Steel by Atom Probe Tomography

2010 ◽  
Vol 1264 ◽  
Author(s):  
Olena Kalokhtina ◽  
Bertrand Radiguet ◽  
Yann de Carlan ◽  
Philippe Pareige
Keyword(s):  
Mechanical Alloying ◽  
Atom Probe Tomography ◽  
Cluster Formation ◽  
Milled Powder ◽  
Hot Extrusion ◽  
Oxide Dispersion Strengthened ◽  
Atom Probe ◽  
Subsequent Annealing ◽  
Oxide Dispersion ◽  
Oxide Dispersion Strengthened Steel

AbstractA high chromium ferritic Oxide Dispersion Strengthened steel was produced by mechanical alloying of Fe-18Cr-1W-0.3Ti-0.3Ni-0.15Si and 0.5% Y2O3 (wt.%) powders in industrial attritor, followed by hot extrusion at 1100°C. The material was characterized by Atom Probe Tomography on each step of manufacturing process: as-milled powder and in final hot extruded state. In addition, to get information on clustering kinetics the powder was also characterized after annealing at 850°C during 1 hour. Atom Probe Tomography revealed that the oxide dispersion strengthened steel Fe-18Cr contains nanometer scale yttrium- and oxygen-enriched nanoclusters in as-milled state. Their evolution is shown after subsequent annealing and hot extrusion. More well defined nanophases also enriched in Ti are observed. A mechanism of their formation is proposed. Mechanical alloying results in supersaturated solid solution with presence of small Y- and O-enriched clusters. Subsequent annealing stimulates incorporation of Ti to the nucleii that were previously formed during mechanical alloying.

Atom Probe Tomography: A Technique for Nanoscale Characterization

2004 ◽  
Vol 10 (3) ◽  
pp. 336-341 ◽  
Author(s):  
M.K. Miller ◽  
E.A. Kenik
Keyword(s):  
Atom Probe Tomography ◽  
Analytical Techniques ◽  
Size Composition ◽  
Oxide Dispersion Strengthened ◽  
Atom Probe ◽  
Oxide Dispersion ◽  
Mechanically Alloyed ◽  
Nanoscale Characterization ◽  
Tomography Data

Atom probe tomography is a technique for the nanoscale characterization of microstructural features. Analytical techniques have been developed to estimate the size, composition, and other parameters of features as small as 1 nm from the atom probe tomography data. These methods are outlined and illustrated with examples of yttrium-, titanium-, and oxygen-enriched particles in a mechanically alloyed, oxide-dispersion-strengthened steel.

scholarly journals Radiation-induced segregation in W-Re: from kinetic Monte Carlo simulations to atom probe tomography experiments

2019 ◽  
Vol 92 (10) ◽  
Author(s):  
Matthew J. Lloyd ◽  
Robert G. Abernethy ◽  
David E. J. Armstrong ◽  
Paul A. J. Bagot ◽  
Michael P. Moody ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Atom Probe Tomography ◽  
Ion Irradiation ◽  
Kinetic Monte Carlo ◽  
Cluster Formation ◽  
Monte Carlo Model ◽  
Atom Probe ◽  
Solubility Limit ◽  
Radiation Induced ◽  
Kinetic Monte Carlo Simulations

Abstract A viable fusion power station is reliant on the development of plasma facing materials that can withstand the combined effects of high temperature operation and high neutron doses. In this study we focus on W, the most promising candidate material. Re is the primary transmutation product and has been shown to induce embrittlement through cluster formation and precipitation below its predicted solubility limit in W. We investigate the mechanism behind this using a kinetic Monte Carlo model, implemented into Stochastic Parallel PARticle Kinetic Simulator (SPPARKS) code and parameterised with a pairwise energy model for both interstitial and vacancy type defects. By introducing point defect sinks into our simulation cell, we observe the formation of Re rich clusters which have a concentration similar to that observed in ion irradiation experiments. We also compliment our computational work with atom probe tomography (APT) of ion implanted, model W-Re alloys. The segregation of Re to grain boundaries is observed in both our APT and KMC simulations. Graphical abstract

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