Gas nitriding and subsequent oxidation of Ti-6Al-4V alloys |
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| Authors: | Dong Bok Lee Iryna Pohrelyuk Oleh Yaskiv Jae Chun Lee |
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| Affiliation: | (1) School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, 440-746, South Korea;(2) Physico-Mechanical Institute of National Academy of Sciences, Lviv, 79601, Ukraine;(3) Department of Materials Science and Engineering, Myongji University, Yongin, 449-728, South Korea |
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| Abstract: | Ti-6Al-4V alloys consisting of α-Ti grains and intergranular β-Ti islands were nitrided at 850°C for 1 to 12 h under a nitrogen pressure of 1 Pa. With increasing nitriding time, the Ti-N compound layer became thicker, and the α-Ti diffusion zone containing dissolved nitrogen became wider. In the Ti-N compound layer, the initially formed Ti2N became TiN as the nitriding progressed. The nitride layers were oxidized to rutile-TiO2 after oxidation at 700°C for 10 h in air. |
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| Keywords: | titanium nitriding nitrogen oxidation |
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