江西省轻质高强结构材料重点实验室学术报告系列(二)

江西省轻质高强结构材料重点实验室学术报告系列(二)

报告题目：Linking Microstructure Evolution to Properties of Materials

报告人：Dr. Kegang Wang, Professor

报告时间：2017年10月24日（星期二）下午15：30

报告地点：机电楼D210

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主办单位： 江西省轻质高强结构材料重点实验室

南昌大学机电工程学院

南昌大学科学技术处

                                      2017年10月22日

报告人简介：

Dr. Kegang Wang, Professor, joined in Mechanical & Aerospace Department, Florida Institute of Technology (FIT) from 2012. From 2006 to 2011, he was Associate Professor in Physics and Space Sciences Department, FIT. From 1999 to 2006, he was Research Assistant Professor/Visiting Scholar, Department of Materials Science and Engineering, Rensselaer Polytechnic Institute (RPI), Troy, New York. Before he moved to RPI, he held Associate Professor position in Beijing Institute of Technology, China. He received his Ph.D. from Chinese Academy of Sciences, China.

Professor Wang’s research covers theoretical, computational and experimental materials science and engineering and non-equilibrium statistical mechanics. He developed several fundamental theories and computer simulation techniques, e.g. diffusion screening theory, stochastic theory, united theory and multiparticle diffusion simulations for phase coarsening with his collaborators, and statistical mechanics of anomalous diffusion. His research was funded by National Science Foundation and NASA in the US, Ministry of Education of China, China Postdoctoral Foundation, and Ministry of Education and Technology of Spain. His research is world-wide cited. In the field of statistical mechanics, he developed generalized Langevin method, generalized Fokker-Planck method, and method of continuous time random walk for anomalous diffusion with his collaborators. His theories in anomalous diffusion are widely applied to explain experimental results in intracellular transport and cell migration and to other complex systems. He authored and coauthored two book chapters and about 63 refereed journal papers. He delivered over 49 colloquia in universities, research institutes, and industries, and invited conference presentations and about 50 contributed conference talks.

报告摘要：

Linking Microstructure Evolution to Properties of Materials

Kegang Wang

Mechanical and Aerospace Engineering Department

Florida Institute of Technology

Microstructures and their evolution control properties and service lifetimes of engineering materials. Modeling and simulation play an increasingly important role in improvement of trial and error methods in material design. Examples of modeling and simulation in microstructure evolution and mechanical properties in lightweight Al-Li alloys, heavy Sn-Pb alloys, superalloys, and maraging steel will be discussed.

Firstly, microstructure theories will briefly be shown. Secondly, simulation methods will briefly be reviewed for microstructure evolution. Spatial correlations, pair distribution functions, particle-size distribution, and interparticle spacings comprise important parameters for controlling properties of materials, all of which can be calculated from our theories and simulations. Thirdly, it will be shown that a methodology to link microstructures and dislocations to the properties of materials through integrating microstructure modeling.  Fourthly, I will present that the integration of microstructure evolution with finite element method, which was successfully applied to alloys and steel. Finally, quantitative comparison among theories, simulations, and experiments will be presented.