|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Interfacial Energy Evaluation in Binary Systems Using Diffusion-Multiples and Simulations
||Qiaofu Zhang, Surendra Makineni, John Allison, Ji-Cheng Zhao
|On-Site Speaker (Planned)
Diffusion multiples were first annealed at a high temperature to create solid solution compositions by interdiffusion and then dual annealed at a lower temperature to induce second phase precipitations as a function of composition/supersaturation for several binary systems in one sample. Precipitate morphology and distribution at different locations were characterized using high resolution SEM and TEM to obtain particle size distribution and mean particle radius. A MatLab program based upon the classical nucleation and growth theory (CNGT) and Kampmann-Wagner numerical (KWN) model was developed to simulate the precipitation process. By adjusting the pre-assumed interfacial energy value, simulated results can be matched with experimental results in order to obtain the interfacial energy between matrix and the second precipitate. The precipitation in both Ni-Al and Fe-Cu systems will be used to demonstrate this methodology.
||Planned: Supplemental Proceedings volume