Journal
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
Volume 64, Issue -, Pages 160-174Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.calphad.2018.12.003
Keywords
bcc Ti-Zr-Nb alloys; Diffusivity; Atomic mobility; CALPHAD modeling; Whittle and Green method
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Funding
- National Natural Science Foundation of China [51671218]
- National Key Research and Development Program of China [2016YFB0701301]
- National Key Basic Research Program of China (973Program) [2014CB644000]
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Diffusion couples were prepared and annealed at 1373 K for 72 h and 1473 K for 48 h, respectively. The interdiffusion coefficients at the intersection composition were obtained using the Whittle and Green method and the ternary trace diffusion coefficients using Hall method. The experimental diffusion coefficients of Ti and Nb in bcc Ti-Zr-Nb system were assessed to develop an atomic mobility database. The calculated diffusion coefficients and composition profiles show good agreement with the experimental data.
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