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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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In this paper, high temperature oxidation behavior of newly developed alloys, Ti-6Al-4Fe and Ti-6Al-1Fe, is examined. To understand the effect of Fe on the air oxidation behavior of the Ti-Al-Fe alloy system, thermal oxidation tests are carried out at $700^{\circ}C$ and $800^{\circ}C$ for 96 hours. Ti-6Al-4V alloy is also prepared and tested under the same conditions for comparison with the developed alloys. The oxidation resistance of the Ti-Al-Fe alloy system is superior to that of Ti-6Al-4V alloy. Ti-6Al-4V shows the worst oxidation resistance for all test conditions. This is not a result of the addition of Fe, but rather it is due to the elimination of V, which has deleterious effects on high temperature oxidation. The oxidation of the Ti-Al-Fe alloy system follows the parabolic rate law. At $700^{\circ}C$, Fe addition does not have a noticeable influence on the amount of weight gain of all specimens. However, at $800^{\circ}C$, Ti-6Al-4Fe alloy shows remarkable degradation compared to Ti-6Al-1Fe and Ti-6Al. It is discovered that the formation of $Al_2O_3$, a diffusion resistance layer, is remarkably hindered by a relative decrease of the ${\alpha}$ volume fraction. This is because Fe addition increases the volume fraction of ${\beta}$ phase within the Ti-6Al-xFe alloy system. Activities of Al, Ti, and Fe with respect to the formation of oxide layers are calculated and analyzed to explore the oxidation mechanism.
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참고문헌 (16)
참고문헌 신청
U. Zwicker / 1980 / in Proceedings of 4th International Conference on Titanium; Titanium '80 Science and Technology :505
P. J. Bania / 1993 / in Proceedings of 7th International Conference on Titanium; Titanium '92 Science and Technology :2787
H. W. Jeong / 2001 / J. Kor. Inst. Met. & Mater 39(1):34
H. Fujii / 2002 / Nippon Steel Tech. Rep 85(1):113
Y. Shida / 1996 / Oxidation of Metals 45(1):197
P. J. Bania / 1993 / in Proceedings of 7th International Conference on Titanium; Titanium '92 Science and Technology :2787
H. W. Jeong / 2001 / J. Kor. Inst. Met. & Mater 39(1):34
H. Fujii / 2002 / Nippon Steel Tech. Rep 85(1):113
Y. Shida / 1996 / Oxidation of Metals 45(1):197
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