TY - JOUR
T1 - Effects of doping elements on oxidation properties of V-Cr-Ti type alloys in several environments
AU - Fujiwara, M.
AU - Natesan, K.
AU - Satou, M.
AU - Hasegawa, A.
AU - Abe, K.
N1 - Funding Information:
This work was partly supported by the JUPITER program (Japan–USA Program of Irradiation Test for Fusion Research) and a Grant-in-Air for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2002/12
Y1 - 2002/12
N2 - The alloys examined in this study include V-4Cr-4Ti-0.5Si, V-4Cr-4Ti-0.5Al, V-4Cr-4Ti-0.5Y and V-4Cr-4Ti. Oxidation experiments were conducted in air. After oxidation, tensile tests, hardness measurements and scanning electron microscopy were performed. Surface oxidation layers were identified by X-ray diffraction (XRD) analysis. Based on this study, the alloy doped with Y was excellent in oxidation resistance at 600 and 700 °C. The XRD indicated that V2O5 was the primary oxide phase for the alloys tested at 700 °C, except for the V-4Cr-4Ti-0.5Y alloy. The oxide identified at all temperatures in V-4Cr-4Ti-0.5Y alloy was VO2, that was also observed for the other alloys after testing at 600 °C. It was suggested that the formation of thin and dense VO2 oxide layers had an important role for superior oxidation properties of the V-4Cr-4Ti-0.5Y alloy. From the results of this study, further optimization of the V-4Cr-4Ti alloy could be possible by controlling the small addition of yttrium.
AB - The alloys examined in this study include V-4Cr-4Ti-0.5Si, V-4Cr-4Ti-0.5Al, V-4Cr-4Ti-0.5Y and V-4Cr-4Ti. Oxidation experiments were conducted in air. After oxidation, tensile tests, hardness measurements and scanning electron microscopy were performed. Surface oxidation layers were identified by X-ray diffraction (XRD) analysis. Based on this study, the alloy doped with Y was excellent in oxidation resistance at 600 and 700 °C. The XRD indicated that V2O5 was the primary oxide phase for the alloys tested at 700 °C, except for the V-4Cr-4Ti-0.5Y alloy. The oxide identified at all temperatures in V-4Cr-4Ti-0.5Y alloy was VO2, that was also observed for the other alloys after testing at 600 °C. It was suggested that the formation of thin and dense VO2 oxide layers had an important role for superior oxidation properties of the V-4Cr-4Ti-0.5Y alloy. From the results of this study, further optimization of the V-4Cr-4Ti alloy could be possible by controlling the small addition of yttrium.
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U2 - 10.1016/S0022-3115(02)01101-7
DO - 10.1016/S0022-3115(02)01101-7
M3 - Article
AN - SCOPUS:0347927281
SN - 0022-3115
VL - 307-311
SP - 601
EP - 604
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1 SUPPL.
ER -