Atomic mobilities, interdiffusivities and their related diffusional behaviors in fcc Co-Cr-Ni alloys

作者：Chen, Jie; Liu, Yajun^*; Sheng, Guang; Lei, Fuyue; Kang, Zhitao

来源：Journal of Alloys and Compounds, 2015, 621: 428-433.

DOI：10.1016/j.jallcom.2014.09.139

• Diffusion
• Mobility
• fcc Co-Cr-Ni alloys
• CALPHAD

Diffusion couples for fcc Co-Cr-Ni ternary system are prepared, all of which are annealed at 1573 K for 50 h. Interdiffusion coefficients are evaluated at the intersection points of two independent diffusion paths sharing a common composition. Such main and cross interdiffusion coefficients are then used to inversely retrieve atomic mobilities of Co, Cr and Ni in fcc Co-Cr-Ni alloys, with the aid of available thermodynamic description. Further validation concerning the quality of atomic mobilities is conducted with computational simulations for diffusion couples annealed at 1573 K for 50 h, the results of which are compared with experimental data. This work contributes to the establishment of a general Co- or Ni-based kinetic database for computational design of superalloys. Published by Elsevier B.V.

• 出版日期2015-2-5
• 单位广东工业大学