플라즈마 침탄 및 CrN 코팅된 Ti-6Al-4V 합금의 구조 및 Creep특성

위명용; 박용권; Myeong-Yong Wey; Yong-Gwon Park

Korean Journal of Materials Research, Vol.14, No.8, 558-564, August, 2004

DOI10.3740/MRSK.2004.14.8.558 Export Citation

플라즈마 침탄 및 CrN 코팅된 Ti-6Al-4V 합금의 구조 및 Creep특성

Properties of Plasma Carburized and CrN Coated Ti-6Al-4V Alloy

위명용 , 박용권^†

충북대학교 재료공학과

Myeong-Yong Wey , and Yong-Gwon Park^†

Dept. of Materials Engineering, Chungbuk National University, Cheongju 361-763, Korea

E-mail:

In order to improve the low hardness and low wear resistance of Ti-6Al-4V alloy, plasma carburization treatment and CrN film coating were carried out. Effects of the plasma carburization and CrN coating were analyzed and compared with the non-treated alloy by mechanical and creep tests. After plasma carburization and CrN coating treatments, the carburized layer was about 150 μm in depth and CrN coated layer was about 7.5 μm in thickness. Hardness value of about H v 402 of the non-treated alloy was improved to H v 1600 and 1390 by plasma carburization and CrN thin film coating, respectively. Stress exponent(n) was decreased from 9.10 in CrN coating specimen to 8.95 in carburized specimen. However, the activation energy(Q) was increased from 242 to 250 kJ/mol. It can be concluded that the static creep deformation for Ti-6Al-4V alloy is controlled by the dislocation climb over the ranges of the experimental conditions.

Keywords:Ti-6Al-4V alloy;plasma-carburizing;CrN coating;hardness;creep

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Lee W, Lin C, Mater. Sci. Eng., 48-59, A241 (1998)
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Weertman J, Trans. AIME, 207, 218 (1960)
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Zhu SJ, Mukherji D, Chen W, Mater. Sci. Eng. A, 256, 301 (1989)

[Related Articles]

[1] Margolin H, Willams JC, Chesnutt JC, Lutjering G, Proc. of the 4th Int's Conf. on Ti, 169-216, 1 (1980)

[2] Lee W, Lin C, Mater. Sci. Eng., 48-59, A241 (1998)

[3] Nakayama D, Ido H, Report of Kobe Steel, 43, 71 (1993)

[4] Berghaus B, U. S. Patent 3181029 (1965) (1965)

[5] Rolinski E, Mater. Sci. Eng. A, 108, 37 (1989)

[6] Muraleedharan TM, Meletis EI, Thin Solid Films, 221, 104 (1992)

[7] Raveh A, Avni R, Thin Solid Films, 186, 241 (1990)

[8] Okamoto J, Yakshiji M, J. Heat Treatment, 40, 25 (2001)

[9] Okamoto J, Yakshiji M, J. Heat Treatment, 40, 88 (2001)

[10] Turns EW, Browning JW, Jones RL, Plat. Surf. Finish., 62, 443 (1975)

[11] Masaru I, Special Steel, 47(3), 6 (1998)

[12] Kotahira, J. JSME. A, 64-628, 3032 (1998)

[13] Masaru I, Suzuki HT, J. Heat Treatment, 41, 305 (2000)

[14] Suzuki HT, J. JSME, 66, 755 (2001)

[15] Smith WF, Principles of Mat. Sci. Eng., 101 (1986)

[16] Garfulo F, Trans. AIME, 351, 229 (1963)

[17] Dorn JH, The Mechanical Behaviour of Materials at Elevated Temperature, p. 432, McGraw-Hill, New York (1961) (1961)

[18] Weertman J, Trans. AIME, 207, 218 (1960)

[19] Hong SH, Weertman J, Acta Met., 34, 735 (1986)

[20] Zhu SJ, Mukherji D, Chen W, Mater. Sci. Eng. A, 256, 301 (1989)