Gas Porosity Formation in the Vanadium Alloys V–W, V–TA, V–ZR During Helium-Atom Irradiation at 650 °C

Stal’tsov, M. S.; Chernov, I. I.; Zaw, Aung Kyaw; Kalin, B. A.; Oo, Kyi Zin

doi:10.1007/s10512-014-9813-4

Cited by 6 publications

(1 citation statement)

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“…Helium affects the kinetics of vacancy porosity development and void swelling [8] and at high concentrations causes gas swelling [9−11]. As well known, pure vanadium is subject to high level of helium swelling but alloying can significantly reduce it [12,13], but the effect of the doping on the helium porosity development can be ambiguous. This paper presents the results of a study of the helium porosity development and gaseous swelling in ternary alloys of the V-Ti-Cr, V-W-Ta and V-W-Zr systems in comparison with binary vanadium alloys after irradiation by helium ions.…”

Section: Introductionmentioning

confidence: 99%

Helium Porosity Formation in Vanadium Alloys of V-Ti-Cr, V-W-Zr and V-W-Ta Systems in Comparison with Binary Alloys

Belyaev

Stal’tsov

Chernov

et al. 2018

Kms

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Vanadium alloys are considered candidates for use as structural materials of fusion reactors. A large amount of helium will be accumulated in such materials. The presence of helium in the materials may result in gas swelling. This paper presents the results Alloy V-4%Ti-4%Cr has a smallest helium swelling among the ternary alloys and its swelling is significantly lower than swelling of dual V-Ti and V-Cr alloys. The swelling of the ternary V-2%W-1%Zr alloy is more than 3 times less than the swelling of vanadium, several times less than that of V-W alloys and slightly lower than the swelling of VZr alloys. Swelling increases by a factor of 1.5 with increasing of Zr content to 2% in the ternary V-2%W-1%Zr alloy. Similarly, gas swelling of ternary V-2%W-1%Ta alloy is significantly lower than that for binary V-W and V-Ta alloys.Assumptions are made about the possible mechanisms of the effect of alloying elements in vanadium on helium porosity formation.

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Section: Introductionmentioning

confidence: 99%