Vanadium alloys – overview and recent results

Muroga, T.; Nagasaka, Tetsuya; Abe, Katsunori; Чернов, В. М.; Matsui, Hideki; Smith, D.L.; Xu, Zhengyang; Zinkle, S.J.

doi:10.1016/s0022-3115(02)01253-9

Cited by 233 publications

(117 citation statements)

References 35 publications

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“…A plate of ODS-FS, having superior swelling resistance and high temperature strength, was fabricated by mechanical alloying, hot extrusion and hot rolling. 5) V4Cr4Ti (NIFSHeat2), having very low oxygen and nitrogen contents and superior fracture toughness, 11) was supplied from the National Institute for Fusion Science (NIFS). The Ti and amorphous foils were commercially available, of which the thickness was 0.020 and 0.025 mm, respectively.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Feasibility of Tungsten/Oxide Dispersion Strengthened Steel Bonding with Vanadium Insert

et al. 2013

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A diffusion bonding (DB) technique to reduce thermal expansion coefficient mismatch between tungsten (W) and oxide dispersion strengthened ferritic steel (ODS-FS) was developed by applying a vanadium (V) alloy as an insert material. In order to suppress · phase precipitation at the interface, DB of ODS-FS and V4Cr4Ti was carried out by introducing a Ti insert as a diffusion barrier between V4Cr4Ti and ODS-FS, and examined feasibility of W/V/Ti/ODS-FS joint for application to fusion reactor components by comparing the three-point bending strength and microstructure between the joints with and without a Ti diffusion barrier layer. It is shown that the fracture strength of the joint without a Ti insert was decreased by 25% after aging at 700°C for 100 h, but that with a Ti insert shows no change after the aging treatment up to 1000 h. The result indicates that the introduction of a Ti insert leads to the prevention of the formation of · phase during aging and resultant control of the degradation of the bonding strength.

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Section: Methodsmentioning

confidence: 99%

Evaluation of Feasibility of Tungsten/Oxide Dispersion Strengthened Steel Bonding with Vanadium Insert

et al. 2013

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“…Together with the blanket development, material development is being performed on a prime candidate material that is RAFM steel, and on silicon carbide composite (SiCf/SiC) [9][10][11], vanadium alloy [12][13][14] and ODS ferritic steel [15][16][17] as next stage structural materials for advanced blankets. The RAFM steels were chosen as the structural material of test blanket modules (TBM) of the ITER by all the participating parties.…”

Section: Introductionmentioning

confidence: 99%

Oxide Dispersion Strengthened Steels for Advanced Blanket Systems

Kimura

Wang

et al. 2016

Plasma and Fusion Research

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Oxide dispersion strengthened (ODS) steels with nano-scaled oxide particles in high density in ferrite/martensite matrix and on grain boundaries of ultra-fine grains have excellent properties as structural material for fusion blankets, while some issues of fabrication processes are still remaining to be solved. In this overview, material properties of recently developed ODS steels are introduced in comparison to ferritic/martensitic (F/M) steels: 1) mechanical properties, 2) corrosion behavior and 3) radiation tolerance in ODS steels, which are outstandingly superior to the F/M steels. Coupling use of the ODS and F/M steels is effective to expand the design margin of fusion blankets. R&D of dissimilar joining of FM/ODS steels is indispensable.

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“…1,2) They have low induced activation characteristics, high temperature strength and high thermal stress factors. Recent researches have successfully resolved many of the critical issues and enhanced the feasibility of vanadium alloys as fusion blanket structural materials.…”

Section: Introductionmentioning

confidence: 99%

“…Large and medium heats of V-4Cr-4Ti have been made in the US, 3) Japan 2,4) and Russia. 5) Especially high purity V-4Cr-4Ti ingot made by collaboration of NIFS and Japanese Universities (NIFS-HEAT-1 and 2) showed superior properties for manufacturing due to the reduced level of oxygen impurities.…”

Section: Introductionmentioning

confidence: 99%

“…5) Especially high purity V-4Cr-4Ti ingot made by collaboration of NIFS and Japanese Universities (NIFS-HEAT-1 and 2) showed superior properties for manufacturing due to the reduced level of oxygen impurities. 2,6) Figure 1 compares radioactivity after use in the first wall of a fusion commercial reactor for four reference alloys. The full-remote and full-hands-on recycle limits are shown to indicate the guideline for recycling and reuse.…”

Section: Introductionmentioning

confidence: 99%

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Vanadium Alloys for Fusion Blanket Applications

Muroga

2005

Mater. Trans.

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Vanadium alloys are attractive candidate structural materials for breeding blanket of fusion reactors because of their low activation properties and high temperature strength. Studies on various blanket designs are being carried out using vanadium alloys as structural materials and liquid lithium or molten salt Flibe as breeding and coolant materials. Recently significant progress in fabrication technology has been made for vanadium alloys through a program of producing large ingots of high purity V-4Cr-4Ti (NIFS-HEATs). Fundamental understandings on the effects of interstitial impurities (C, N, O) on mechanical properties, radiation effects on microstructure and mechanical properties, corrosion and compatibility in various environments were enhanced. New promising candidates were identified for the MHD insulator coating. Among the remaining critical issues are the effects of transmutant helium on mechanical properties and development of long life MHD coating. Development of vanadium alloys will be carried out in coordination with IFMIF and ITER-TBM schedules as essential tools for verification of their performance in fusion blanket environments.

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Vanadium alloys – overview and recent results

Cited by 233 publications

References 35 publications

Evaluation of Feasibility of Tungsten/Oxide Dispersion Strengthened Steel Bonding with Vanadium Insert

Evaluation of Feasibility of Tungsten/Oxide Dispersion Strengthened Steel Bonding with Vanadium Insert

Oxide Dispersion Strengthened Steels for Advanced Blanket Systems

Vanadium Alloys for Fusion Blanket Applications

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