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
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Investigation of the Effect of 475 °C Aging Treatment on Mechanical Properties of a Fe–19Cr–5.5Al ODS Alloy Using Tensile, Impact and Small Punch Tests
TL;DR: In this paper, the effect of thermal aging on the mechanical properties of a Fe19Cr-5.5Al oxide dispersion strengthened (ODS) hot rolled steel plate was evaluated.
Journal ArticleDOI
Experimental investigation on the low temperature fracture performance of Q690 steel for application to long-span high-speed railway bridges in Tibet harsh environment
TL;DR: In this paper , the effect of temperature on Charpy impact energy (AKV) and CTOD (δ) follows the Boltzmann function law, and the mechanism of brittle fracture of high-strength steel caused by low temperature is revealed using a metallographic phase and microstructure of the target material.
ReportDOI
Optimized Compositional Design and Processing-Fabrication Paths for Larger Heats of Nanostructured Ferritic Alloys
TL;DR: In this article, the authors address the goal of "major increases in fuel burn-up than yet achieved" in the FC-2 scope area that will require new improved cladding materials.
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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Perspective of ODS alloys application in nuclear environments
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