Effective evaluation of interfacial energy by matching precipitate sizes measured along a composition gradient with Kampmann-Wagner numerical (KWN) modeling

SCRIPTA MATERIALIA

卷:160

Article

Zhang, Qiaofu¹  Makineni, Surendra K.^2,3  Allison, John E.²  Zhao, Ji-Cheng¹ 

[1] Ohio State Univ, Dept Mat Sci & Engn, 116 W 19Th Ave, Columbus, OH 43210 USA

[2] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[3] Max Planck Inst Eisenforsch GmbH, Dept Microstruct Phys & Alloy Design, D-40237 Dusseldorf, Germany

关键词: Interfacial energy;    Phase precipitation;    Nucleation and growth;    KWN model;    Diffusion multiples;   

DOI  :  10.1016/j.scriptamat.2018.09.048

来源: Elsevier

【 摘 要 】

A dual-anneal diffusion multiple was utilized to generate a composition gradient via a first anneal at a high temperature followed by a second anneal at a lower temperature to induce phase precipitation as a function of composition/supersaturation. By adjusting the interfacial energy value in simulations using the classical nucleation and growth theories as implemented in the Kampmann-Wagner numerical (KWN) model and matching the simulated average precipitate sizes at different compositions with the experimental measurements along the composition gradient, the Ni3Al/fcc interfacial energy in the Ni-Al system at 700 degrees C was effectively determined to be similar to 12 mJ/m(2). (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free