{"title":"Effect of Gas-Diffusion Oxynitriding on Microstructure and Hardness of Ti-6Al-4V Alloys","authors":"Dong Bok Lee, Min Jung Kim","volume":122,"journal":"International Journal of Materials and Metallurgical Engineering","pagesStart":141,"pagesEnd":145,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10006350","abstract":"
The commercially available titanium alloy, Ti-6Al-4V, was oxynitrided in the deoxygenated nitrogen gas at high temperatures followed by cooling in oxygen-containing nitrogen in order to analyze the influence of oxynitriding parameters on the phase modification, hardness, and the microstructural evolution of the oxynitrided coating. The surface microhardness of the oxynitrided alloy increased due to the strengthening effect of the formed titanium oxynitrides, TiNx<\/sub>Oy<\/sub>. The maximum microhardness was obtained, when TiNx<\/sub>Oy<\/sub> had near equiatomic composition of nitrogen and oxygen. It could be attained under the optimum oxygen partial pressure and temperature-time condition.<\/p>\r\n","references":"[1]\tA. Shenhar, I. Gotrnan and S. Radin, \u201cTitanium nitride coatings on surgical titanium alloys produced by a powder immersion reaction assisted coating method: residual stresses and fretting behavior,\u201d Surface and Coatings Technology, vol. 126, pp. 210-218, 2000.\r\n[2]\tA. Leonhard, H. Liepack, and K. Bartsch, \u201cCVD of TiCx\/a-C-layers under D.C.-pulse discharge,\u201d Surface and Coatings Technology, vol. 133-134, pp. 186-190, 2000.\r\n[3]\tF. Lapostoll, A. Billard and J. von Stebut, \u201cStructure\/mechanical properties relationship of titanium\u2013oxygen coatings reactively sputter-deposited,\u201d Surface and Coatings Technology, vol. 135, pp. 1-7, 2000.\r\n[4]\tE. Alvesa, A. R. Ramosa, N. P. Barradasa, F. Vazc, P. Cerqueirac, L. Reboutac and U. Kreissigd, \u201cIon beam studies of TiNxOy thin films deposited by reactive magnetron sputtering,\u201d Surface and Coatings Technology, vol. 180-181, pp. 372-376, 2004.\r\n[5]\tN. Martin., O. Banakh and A. M. E. Santo, \u201cCharacterizations of titanium oxide films prepared by radio frequency magnetron sputtering,\u201d Thin Solid Films, vol. 287, pp. 154-163, 1996.\r\n[6]\tJ. Probst, U. Gbureck and R. Thull, \u201cBinary nitride and oxynitride PVD coatings on titanium for biomedical applications,\u201d Surface and Coatings Technology, vol. 148, pp. 226-233, 2001.\r\n[7]\tR. Abbaschian and R. E. Reed-Hill, Physical Metallurgy Principles, PWS Publishing Company, USA 1992, 706-718\r\n[8]\tB. S. Yilbas, A. Z. Sahin, A. Z. Al-Garni, S. A. M. Said, Z. Ahmed, B. J. Abdulaleem and M. Sami, \u201cPlasma Nitriding of Ti-6 Al-4 V Alloy to Improve Some Tribological Properties,\u201d Surface and Coatings Technology, vol. 80, pp. 287-292, 1996.\r\n[9]\tF. Borgioli, E. Galvanetto, A. Fossati and G. Pradelli, \u201cGlow-discharge and furnace treatments of Ti-6Al-4V,\u201d Surface and Coatings Technology, vol. 184, pp. 255-262, 2004.\r\n[10]\tO. I. Yaskiv, I. M. Pohrelyuk, V. M. Fedirko, D. B. Lee and O. V. Tkachuk, \u201cFormation of oxynitrides on titanium alloys by gas diffusion treatment,\u201d Thin Solid Films, vol. 519, pp. 6508-6514, 2011.\r\n[11]\tI. M. Pohrelyuk, V. M. Fedirko, O. I. Yaskiv, D. B. Lee and O. V. Tkachuk, \u201cInfluence of parameters of modifying oxygen-coating atmosphere on oxynitriding of Titanium alloys,\u201d Materials Science, vol. 45, pp. 6, 2009. ","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 122, 2017"}