Journal
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
Volume 62, Issue -, Pages 83-91Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.calphad.2018.05.008
Keywords
Ti-Al-Nb ternary alloys; Whittle-Green; Generalized Hall method; Diffusion; Diffusion mobility; DICTRA modeling
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Funding
- Natural Science Funds of China [51571113]
- Joint Project of Industry-University-Research of Jiangsu Province [BY2016005]
- Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University
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Diffusion behavior in BCC Ti-Al-Nb ternary alloys was investigated at 1473 K by the experimental solid-state diffusion couple technique. The extraction of inter- and impurity diffusion coefficients, by the Whittle-Green and generalized Hall methods respectively, enables the diffusion properties of BCC Ti-Al-Nb alloys to be constructed at the Ti-rich corner. The determined diffusion data, together with those from the literature, have been thoroughly evaluated and then assessed to develop the atomic mobility for the BCC Ti-Al-Nb ternary alloys. The validated mobility parameters have been applied to predict a full diffusion picture of the Ti-Al-Nb BCC alloys and interesting interdiffusion behavior of the diffusion experiments.
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