Super high-temperature strength in hot rolled steels dispersing nanosized oxide particles

Ukai, Shigeharu; Miyata, R.; Kasai, S.; Oono, Naoko; Hayashi, Shigenari; Azuma, Tsukasa; Kayano, Rinzo; Maeda, Eiji; Ohtsuka, Satoshi

doi:10.1016/j.matlet.2017.08.101

Cited by 8 publications

(4 citation statements)

References 11 publications

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“…Likewise, a 12Cr ferritic grade ODS with a higher W content (2wt%) than the 14Cr ODS grade studied here, exhibits lifetime significantly higher than the one observed in this project [23], [24].…”

Section: Discussionmentioning

confidence: 50%

“…The creep performance of ODS tubes strongly depends on the microstructure of the material and the amount of strengthening nano-oxides. For example, with regard to martensitic ODS steels, JAEA has developed tubes with a specific ferrito-martensitic microstructure with internal pressure properties which are superior to those of the 9Cr ODS tubes tested in this study [24,34].…”

Section: Discussionmentioning

confidence: 99%

“…For example, JAEA has developed tubes creep tests using two end plugs welded by PRW [18]. This technics enables a large number of tests in the same furnace [23], [24] but is not optimal considering the deformation monitoring during testing. At CEA, electron beam welding is used for manufacturing of long samples where welded regions are protected during testing by water boxes [15].…”

Section: Introductionmentioning

confidence: 99%

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Creep Properties of 9Cr and 14Cr ODS Tubes Tested by Inner Gas Pressure

Sornin

Ehrnstén

Mozzani³

et al. 2021

Metall Mater Trans A

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9Cr and 14Cr ODS steel tubes are creep tested by inner gas pressure representative of the fission gas loading encountered in service conditions. • Creeps tests handled by 4 different European teams with different experimental set-up are consistent showing a very low scattering • The ODS steel tubes typical failure mode is leakage without burst on a longitudinal crack occurring at very low hoop strain.

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Section: Discussionmentioning

confidence: 50%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Creep Properties of 9Cr and 14Cr ODS Tubes Tested by Inner Gas Pressure

Sornin

Ehrnstén

Mozzani³

et al. 2021

Metall Mater Trans A

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“…Figure 7 b displays that the TMP ODS alloy exhibits better ductility compared with the HIP alloy from 400 °C to 700 °C. It is considered that the partially coarsened grains suppress the grain boundary deformation, and thus improve the tensile ductility [ 29 ]. Among all materials, the highest total elongation is reached at 600 °C, and then the total elongation drops in the range of 600 °C to 700 °C.…”

Section: Discussionmentioning

confidence: 99%

Effect of Hot Rolling on the Microstructure and Properties of Nanostructured 15Cr ODS Alloys with Al and Zr Addition

Chen

Zhang

et al. 2020

Materials

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Oxide dispersion strengthened (ODS) alloys with Al and Zr addition have excellent radiation tolerance, high-temperature strength, and corrosion resistance. The 15Cr-Al-Zr-ODS alloys are processed by mechanical alloying (MA), hot isostatic pressing (HIP), subsequent hot rolling to large strains of 70%, and further annealing. The effect of hot rolling on the microstructure, and the properties of nanostructured 15Cr ODS alloys with Al and Zr addition, were investigated. The microstructure after hot rolling and annealing showed obvious anisotropy. The cubic texture (φ1 = 0°, Φ = 0°, φ2 = 0°) {0 0 1} <1 0 0> and brass-R texture (φ1 = 0°, Φ = 55°, φ2 = 45°) {1 1 1} <1 1 0> were observed. The similar size distribution of precipitates was obtained for the comparison of the hot rolling samples with the hot isostatic pressed samples, which can be attributed to excellent thermal stability. After hot rolling, the alloy showed higher yield strength but did not lose too much plasticity.

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