Ti-Al-Fe계 합금의 고온산화거동에 미치는 Fe의 영향

윤장원; 현용택; 김정한; 염종택; 윤석영; Jang-Won Yoon; Yong-Taek Hyun; Jeoung-Han Kim; Jong-Taek Yeom; Seog-Young Yoon

Korean Journal of Materials Research, Vol.21, No.7, 357-363, July, 2011

DOI10.3740/MRSK.2011.21.7.357 Export Citation

Ti-Al-Fe계 합금의 고온산화거동에 미치는 Fe의 영향

Effect of Fe on the High Temperature Oxidation of Ti-Al-Fe Alloys

윤장원, 현용택^{1, †}, 김정한¹, 염종택¹, 윤석영

부산대학교 재료공학부
¹재료연구소 특수합금연구그룹

Jang-Won Yoon, Yong-Taek Hyun^{1, †}, Jeoung-Han Kim¹, Jong-Taek Yeom¹, and Seog-Young Yoon²

Department of Materials Science and Engineering, Pusan National University, Busan 609-735, Korea
¹Special Alloys Research Group, Korea Institute of Materials Science (KIMS), Changwon 642-831, Korea
²부산대학교, 재료공학부, Korea

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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 700oC and 800oC 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 700oC, Fe addition does not have a noticeable influence on the amount of weight gain of all specimens. However, at 800oC, Ti-6Al-4Fe alloy shows remarkable degradation compared to Ti-6Al-1Fe and Ti-6Al. It is discovered that the formation of Al2O3, a diffusion resistance layer, is remarkably hindered by a relative decrease of the α volume fraction. This is because Fe addition increases the volume fraction of β 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.

Keywords:Ti-Al-Fe alloy;oxidation;iron;alloying element;oxide layer

[References]

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Jeong HW, Kim SE, Hyun YT, Lee YT, J. Kor. Inst. Met. & Mater., 39(1), 34 (2001)
Fujii H, Takahashi K, Nippon Steel Tech. Rep., 85(1), 113 (2002)
Shida Y, Anada H, Oxidation of Metals, 45(1-2), 197 (1996)
Lee DB, Metals and Materials Int., 11(4), 313 (2005)
Kim MH, Lee DB, J. Kor. Inst. Surf. Eng., 33(4), 281 (2000)
Guleryuz H, Cimenoglu H, J. Alloy. Comp., 472, 241 (2009)
Du HL, Datta PK, Lewis DB, Burnell-Gray JS, Corrosion Sci., 36(4), 631 (1994)
Brady MP, Brindley WJ, Smialek JL, Locci IE, J. Met., 48(11), 46 (1996)
Shida Y, Anada H, Corrosion Sci., 35(5-8), 945 (1993)
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Leyens C, Peters M, Titanium and Titanium Alloys;Fundamentals and Applications, p.17, Wiley-VCH, German (2003). (2003)
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Luthra KL, Oxidation of Metals, 36(5-6), 475 (1991)

[Related Articles]

[1] Zwicker U, Buhler K, Muller R, Beck H, Schmid HJ, Frest J, in Proceedings of 4th International Conference on Titanium; Titanium '80 Science and Technology (Kyoto, Japan, May 1980) ed. Kimura H, Izumi O (Metallurgical Society of AIME, Warrendale, PA, USA, 1980) p. 505. (1980)

[2] Bania PJ, Hutt AJ, Adams RE, Parris WM, in Proceedings of 7th International Conference on Titanium; Titanium '92 Science and Technology (San Diego, USA, June 1992) ed. by Froes FH, Caplan IL (Minerals, Metals and Materials Society, Warrendale, PA, USA, 1993) p. 2787. (1992)

[3] Jeong HW, Kim SE, Hyun YT, Lee YT, J. Kor. Inst. Met. & Mater., 39(1), 34 (2001)

[4] Fujii H, Takahashi K, Nippon Steel Tech. Rep., 85(1), 113 (2002)

[5] Shida Y, Anada H, Oxidation of Metals, 45(1-2), 197 (1996)

[6] Lee DB, Metals and Materials Int., 11(4), 313 (2005)

[7] Kim MH, Lee DB, J. Kor. Inst. Surf. Eng., 33(4), 281 (2000)

[8] Guleryuz H, Cimenoglu H, J. Alloy. Comp., 472, 241 (2009)

[9] Du HL, Datta PK, Lewis DB, Burnell-Gray JS, Corrosion Sci., 36(4), 631 (1994)

[10] Brady MP, Brindley WJ, Smialek JL, Locci IE, J. Met., 48(11), 46 (1996)

[11] Shida Y, Anada H, Corrosion Sci., 35(5-8), 945 (1993)

[12] Taylor RW, Am. Mineral., 49, 1016 (1964)

[13] Leyens C, Peters M, Titanium and Titanium Alloys;Fundamentals and Applications, p.17, Wiley-VCH, German (2003). (2003)

[14] Son UT, Corrosion of Metals Engineering, p. 265, Namyoungmunhwasa, Seoul, Korea (1981) (in Korean). (1981)

[15] Gaskell DR, Physical Metallurgy, 4th ed., p. 447, ed. Cahn RW, Haasen P, Elsevier Science, BV, USA (1996)

[16] Luthra KL, Oxidation of Metals, 36(5-6), 475 (1991)