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The Effect of Colored Titanium Oxides on the Color Change on the Surface of Ti-5Al-5Mo-5V-1Cr-1Fe Alloy

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Abstract

In the present investigation, a color change on the surface of Ti-5Al-5Mo-5V-1Cr-1Fe alloy was studied through thermal oxidation experiments in the temperature range of 100-1000 °C with an interval of 50 °C. The phase composition and morphology of oxide layer were characterized by x-ray diffraction and light optical microscopy, respectively. The result shows that the achieved colors after thermal oxidation followed a chromatic scale which went from silver white to light yellow to golden yellow to blue and then to light green and brownish black. The color change on the alloy mainly resulted from the different colored titanium oxides in the oxide layer. The silver white, yellow, and blue on the alloy with the oxidation temperature below 600 °C were the results of TiO2 white tint, TiO golden tint, and Ti2O3 blue color, respectively. The light green was the mixed color of TiO golden tint and Ti2O3 blue color in the oxidation temperature range of 600-700 °C. However, at the oxidation temperatures exceeding 750 °C, the color turned to be brownish black. It might be associated with the thick, porous, and multilayered oxide layer. Consequently, it can be suggested that the illustration of the color change is vitally necessary for assessing the quality of the final workpieces according to the color change on titanium alloys.

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Acknowledgments

The authors thank the financial support from the National Natural Science Foundation of China (Grant No. 51075333) and the Program for New Century Excellent Talents in university (Grant No. NCE-07-0696).

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China

    Wenwen Peng, Weidong Zeng, Yaowu Zhang, Biao Quan & Jianding Wu

  2. Xi’an Aircraft Industry Company LTD, Xi’an, 710089, China

    Chunling Shi

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  1. Wenwen Peng
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  2. Weidong Zeng
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Correspondence to Wenwen Peng.

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Peng, W., Zeng, W., Zhang, Y. et al. The Effect of Colored Titanium Oxides on the Color Change on the Surface of Ti-5Al-5Mo-5V-1Cr-1Fe Alloy. J. of Materi Eng and Perform 22, 2588–2593 (2013). https://doi.org/10.1007/s11665-013-0573-4

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  • DOI: https://doi.org/10.1007/s11665-013-0573-4

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