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Laser surface nitriding of Ti6Al4V alloy coupled with an external stress field

Published online by Cambridge University Press:  31 January 2011

Shan-Tung Tu
Affiliation:
Key Laboratory of Safety Science of Pressurized System, Ministry of Education (Mechanical Education), School of Mechanical Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
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Abstract

We report on an approach for laser surface nitriding of Ti6Al4V alloy coupled with an applied stress field. A surprising finding was that, with increasing the applied stress levels, the decreased residual stress, the nitrogen concentration near the surface, and the surface microhardness of the nitrided layer were associated with the increased friction coefficient. Across the depth of the nitrided layer, the hardness, the elastic modulus, and the wear resistance (H/E) measured by nanoindentation decreased gradually and were ascribed to the gradient of nitrogen concentration in the melt zone.

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Articles
Copyright
Copyright © Materials Research Society 2010

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References

REFERENCES

1.Katayama, S., Matsunawa, A., Morimoto, A., Ishimoto, S., Arata, Y.Proceedings of the Fifth International Conference on Applied Laser Electro-Optics (Laser Institute of America, Orlando, FL 1983)127Google Scholar
2.Schaaf, P.Laser nitriding of metals. Prog. Mater. Sci. 47, 1 (2002)Google Scholar
3.Raaif, M., El-Hossary, F.M., Negm, N.Z., Khalil, S.M., Kolitsch, A., Höche, D., Kaspar, J., Mändl, S., Schaaf, P.CO2 laser nitriding of titanium. J. Phys. D: Appl. Phys. 41, 1 (2008)CrossRefGoogle Scholar
4.Biswas, A., Li, L., Chatterjee, U.K., Manna, I., Pabi, S.K., Majumdar, J.D.Mechanical and electrical properties of laser surface nitrided Ti–6Al–4V. Scr. Mater. 59, 239 (2008)CrossRefGoogle Scholar
5.Yilbas, B.S., Karatas, C., Uslan, I., Keles, O., Usta, I.Y., Ahsan, M.CO2 laser gas assisted nitriding of Ti–6Al–4V alloy. Appl. Surf. Sci. 252, 8557 (2006)CrossRefGoogle Scholar
6.Höche, D., Schikora, H., Zutz, H., Queitsch, R., Emmel, A., Schaaf, P.Microstructure of TiN coatings synthesized by direct pulsed Nd:YAG laser nitriding of titanium: Development of grain size, microstrain, and grain orientation. Appl. Phys. A 91, 305 (2008)CrossRefGoogle Scholar
7.Abboud, J.H., Fidel, A.F., Benyounis, K.Y.Surface nitriding of Ti–6Al–4V alloy with a high power CO2 laser. Opt. Laser Technol. 40, 405 (2008)Google Scholar
8.Fu, Y., Wei, J., Batchelor, A.W.Some considerations on the mitigation of fretting damage by the application of surface-modification technologies. J. Mater. Process. Technol. 99, 231 (2000)CrossRefGoogle Scholar
9.Fu, Y., Batchelor, A.W.Laser nitriding of pure titanium with Ni, Cr for improved wear performance. Wear 214, 83 (1998)Google Scholar
10.Hu, C., Baker, T.N.The importance of preheat before laser nitriding a Ti–6Al–4V alloy. Mater. Sci. Eng., A 265, 268 (1999)Google Scholar
11.Selamat, M.S., Baker, T.N., Watson, L.M.Study of the surface layer formed by the laser processing of Ti–6Al–4V alloy in a dilute nitrogen environment. J. Mater. Process. Technol. 113, 509 (2001)Google Scholar
12.Pérez, M.G., Harlan, N.R., Zapirain, F., Zubiri, F.Laser nitriding of an intermetallic TiAl alloy with a diode laser. Surf. Coat. Technol. 200, 5152 (2006)Google Scholar
13.Xue, L., Islam, M., Koul, A.K., Bibby, M., Wallace, W.Laser gas nitriding of Ti–6Al–4V. Part 1: Optimization of the process. Adv. Perform. Mater. 4, 25 (1997)CrossRefGoogle Scholar
14.Carpene, E., Landry, F., Schaaf, P.Modeling of nitrogen depth profiles in iron after nitriding with a homogenized laser beam. Appl. Phys. Lett. 77, 2412 (2000)Google Scholar
15.Höche, D., Müller, S., Rapin, G., Shinn, M., Remdt, E., Gubisch, M., Schaaf, P.Marangoni convection during free electron laser nitriding of titanium. Metall. Mater. Trans. B 40, 497 (2009)CrossRefGoogle Scholar
16.Xuan, F.Z., Shao, S.S., Wang, Z.D., Tu, S.T.Coupling effects of chemical stresses and external mechanical stresses on diffusion. J. Phys. D: Appl. Phys. 42, 015401 (2009)CrossRefGoogle Scholar
17.Robinson, J.M., Van Brussel, B.A., De Hosson, J.Th.M., Reed, R.C.X-ray measurement of residual stresses in laser surface melted Ti–6A1–4V alloy. Mater. Sci. Eng., A 208, 147 (1996)Google Scholar
18.Hu, C., Xin, H., Watson, M., Baker, T.N.Analysis of the phases developed by laser nitriding Ti–6Al–4V alloys. Acta Mater. 45, 4311 (1997)CrossRefGoogle Scholar
19.György, E., Pérez del Pino, A., Serra, P., Morenza, J.L.Depth profiling characterization of the surface layer obtained by pulsed Nd:YAG laser irradiation of titanium in nitrogen. Surf. Coat. Technol. 173, 265 (2003)Google Scholar
20.Yilbas, B.S., Nickel, J., Coban, A., Sami, M., Shuja, S.Z., Aleem, A.Laser melting of plasma nitrided Ti–6Al–4V alloy. Wear 212, 140 (1997)CrossRefGoogle Scholar
21.Hirsch, T.K., Rocha, A.Da.S., Ramos, F.D., Strohaecker, T.R.Residual stress affected diffusion during plasma nitriding of tool steels. Metall. Mater. Trans. A 35, 3523 (2004)CrossRefGoogle Scholar
22.Schaaf, P., Landry, F., Lieb, K.P.Origin of nitrogen depth profiles after laser nitriding of iron. Appl. Phys. Lett. 74, 153 (1999)Google Scholar
23.Wen, S.P., Zong, R.L., Zeng, F., Guo, S., Pan, F.Nanoindentation and nanoscratch behaviors of Ag/Ni multilayers. Appl. Surf. Sci. 255, 4558 (2009)CrossRefGoogle Scholar
24.Leyland, A., Matthews, A.On the significance of the H/E ratio in wear control: A nanocomposite approach to optimised tribological behavior. Wear 246, 1 (2000)CrossRefGoogle Scholar
25.Huang, L.Y., Lu, J., Xu, K.W.The nanoscratch behaviour of different diamond-like carbon film substrate systems. J. Phys. D: Appl. Phys. 37, 2135 (2004)CrossRefGoogle Scholar