MSE Seminar: Qiaofu Zhang, Use Diffusion Multiple to Investigate Diffusion and Precipitation Behavior in Binary systems

Abstract

Diffusion-Multiple approach has been proved to be an efficient methodology to generate composition library, and to further establish composition-property relationship. Composition profiles for various systems were collected from diffusion multiples. Apart from traditional extraction method, a forward-simulation method was put forward to extract chemical diffusion and impurity diffusion coefficients from experimental compositions. Diffusion multiples were dual-annealed after first heat treatment to generate second phase precipitates within a composition gradient for many systems, including Ni-Al and Cu-Cr. Simulations were carried out and compared with experimental measured particle information, thus the interfacial energy between the matrix and second phase precipitates can be evaluated.

Bio

Qiaofu Zhang has been a graduate research associate in Dr. Ji-Cheng Zhao’s group since year 2010, right after his graduation from University of Science and Technology of China with a bachelor’s degree of Applied Physics. During his PhD period, he has been amazed by the concept of Integrated Computational Materials Engineering (ICME) and working in this area by establishing essential kinetics and phase transformation database for ICME. Besides that, he enjoys self-driving travel and hiking.