Journal ArticleDOI
Influence of the microstructure on the tensile and impact properties of a 14Cr ODS steel bar
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TLDR
In this article, a 14Cr oxide dispersion strengthened (ODS) steel bar was characterized by different microstructural techniques in order to evaluate the link between its microstructure and the mechanical properties achieved.Abstract:
A Fe–14Cr–1W–0.4Ti–0.3Y203 ferritic steel bar was characterised by different microstructural techniques in order to evaluate the link between its microstructure and the mechanical properties achieved. This bar was produced by mechanical alloying of a pre-alloyed gas atomised powder with yttria particles, followed by hot extrusion and subsequently annealing. The knowledge of the microstructure of this 14Cr oxide dispersion strengthened (ODS) steel allows for the explanation of the mechanical properties observed, such as the decrease of the ductility found in the transverse orientation of the bar, the existence of zig-zag crack paths in the broken specimens after the impact tests at low temperatures and the appearance of delaminations when the temperature is increased.read more
Citations
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Study of Crystallographic Texture Evolution during High-Temperature Deformation of 18Cr-ODS Ferritic Steel based on Plasticity Assessment
TL;DR: The degree of texture evolution after deformation along the ED and the transverse direction (TD) with respect to the initial condition has been predicted using VPSC-5 constitutive model and shows that the deformationAlong the ED produces a dominant γ-fiber texture in contrast to the TD.
Journal ArticleDOI
Behavior of Fe-ODS Alloys After Thermal Aging Treatments
TL;DR: In this article, the microstructural stability and the mechanical properties of a Fe-ODS alloy are studied after different thermal aging experiments at 973 K (700 K), 5000 K, 10,000 K, and 1123 K (850 K), 10, 000 hours.
Journal ArticleDOI
Evaluation of deformation and recrystallization behavior in oxide dispersion strengthened 18Cr ferritic steel
TL;DR: In this paper, an experimental study aimed to obtain an ultrafine equiaxed grain distribution in 18Cr oxide dispersion strengthened (ODS) ferritic steel through cold working and annealing starting with an initial columnar grain structure with a predominant α-fibre texture in a product consolidated from the alloy powders during extrusion at high temperatures.
Journal ArticleDOI
Microstructural Characterization of Novel ZrO_2 Dispersion-Strengthened 9Cr Steel by Spark Plasma Sintering
TL;DR: In this paper , a fine-grained microstructure with finer dispersoids in as-sintered and normalized condition was found to be retained even after subjecting the samples at 973 K for as long as 1000 h for long-term thermal aging trials, indicating at a possible superiority of this material over the conventional Oxide Dispersion-Strengthened steels.
References
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Journal ArticleDOI
Perspective of ODS alloys application in nuclear environments
Shigeharu Ukai,Masayuki Fujiwara +1 more
TL;DR: In this article, the authors reviewed the JNC activities on ODS steel development as "nano-composite materials" and concluded that the ODS-technology development achieved in the field of fast reactors should be effectively spun off to the fusion reactor first wall and blanket structural materials to allow for safe and economical reactor design.
Journal ArticleDOI
Oxide dispersion-strengthened steels: A comparison of some commercial and experimental alloys
TL;DR: In this article, the differences and similarities of different ODS steels are explained in terms of the microstructures of the steels, and observations are explained using the properties of the ODS micro-structures.
Journal ArticleDOI
Alloying design of oxide dispersion strengthened ferritic steel for long life FBRs core materials
Shigeharu Ukai,M. Harada,Hirokazu Okada,M. Inoue,S. Nomura,Sakae Shikakura,Kazutaka Asabe,Toshio Nishida,Masayuki Fujiwara +8 more
TL;DR: In this paper, the α to γ transformation in ODS martensitic steel has been successfully achieved by introducing the α-to-γ transformation in 13Cr-3W ODS ferritic steels.
Journal ArticleDOI
Influence of Particle Dispersions on the High-Temperature Strength of Ferritic Alloys
David T. Hoelzer,James Bentley,Mikhail A. Sokolov,Michael K Miller,G.R. Odette,Matthew Joseph Alinger +5 more
TL;DR: In this article, four ferritic alloys based on the composition Fe-14Cr-3W-0.4Ti were developed with a predominant dispersion of either oxide particles or nano-size Y-, Ti-, O-rich clusters, or nanoclusters (NC).
Journal ArticleDOI
Identifiying creep mechanisms at low stresses
TL;DR: There are three possible mechanisms occurring in high temperature creep at low stresses: diffusion creep, Harper-Dorn creep and grain boundary sliding as discussed by the authors, and two sets of measurements that may be used to give an unambiguous identification of the dominant creep mechanism.
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