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Titolo:
Effects of doping elements on oxidation properties of low-activation vanadium alloys
Autore:
Fujiwara, M; Natesan, K; Satou, M; Hasegawa, A; Abe, K; Takahashi, T; Sugawara, T; Shishido, T;
Indirizzi:
Tohoku Univ, Grad Sch Engn, Dept Quantum Sci & Energy Engn, Sendai, Miyagi9808579, Japan Tohoku Univ Sendai Miyagi Japan 9808579 ngn, Sendai, Miyagi9808579, Japan
Titolo Testata:
MATERIALS TRANSACTIONS
fascicolo: 6, volume: 42, anno: 2001,
pagine: 1048 - 1051
SICI:
1345-9678(200106)42:6<1048:EODEOO>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
SI-TYPE ALLOYS; TI;
Keywords:
oxidation; low activation materials; mechanical properties; fusion reactor materials; vanadium alloys;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Fujiwara, M Tohoku Univ, Grad Sch Engn, Dept Quantum Sci & Energy Engn, Sendai, Miyagi9808579, Japan Tohoku Univ Sendai Miyagi Japan 9808579 Miyagi9808579, Japan
Citazione:
M. Fujiwara et al., "Effects of doping elements on oxidation properties of low-activation vanadium alloys", MATER TRANS, 42(6), 2001, pp. 1048-1051

Abstract

V-(4-5)Ti-(4-5)Cr type alloys doped with Si, Al and Y were studied in an effort to develop oxidation-proof vanadium alloys. In order to clarify the effects of the doping elements, the oxidation behavior of V-4Ti-Cr, V-4Ti-4Cr-0.5Si, V-4Ti-4Cr-0.5Al and V-4T-4Cr-0.5Y alloys was studied. Thermogravimetric analysis (TGA) experiments in dr at 400, 500, 620 and 650 degreesC and exposure to air, helium and low oxygen partial pressure atmospheres at 500 degreesC for 250 h were carried out for each alloy. After exposure, measurement of mass gain and tensile tests were performed to study the influenceof the exposure atmosphere on each alloy. After exposure to helium atmosphere with oxygen partial pressure P-O2 = 20 Pa gave a smaller mass gain thanthat by the low oxygen partial pressure atmosphere of P-O3 = 1.3 x 10(-4) Pa. Tensile testing at room temperature showed that the V-4Ti-4Cr-0.5Si alloy has the highest ultimate tensile stress, and V-4Ti-4Cr-0.5Y has the highest total elongation after exposure for all the atmospheres. The results ofthe TGA experiments in air show that yttrium doping is more effective at higher-temperature exposure. The V-4Ti-4Cr-0.5Y alloy has the highest oxidation-resistance at 620 degreesC in all the alloys. The TGA data fit the parabolic oxidation law, especially in the first stage of oxidation time up to 30 h.

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Documento generato il 12/07/20 alle ore 05:06:04