清華大學動力機械系 專題演講

講題：Modeling of 3D Additive Printing of Metal Products

Professor Emeritus Shi-chune Yao (姚詩訓教授)

Department of Mechanical Engineering, Carnegie Mellon University

Abstract

Additive Manufacturing (AM) of metal products is the selective laser melting (SLM) of metal powders to form the products in one process. It has advantages of combining parts, making products with internal structures, and creating prototypes quickly, etc.  The Multi-scale modeling covering trace, layer and full product has been established at CMU.  From the model, the melt-pool characteristics, the process map, the thermal history during the production, the residual stress, the distortion, and the material properties in the product are predictable.  The predictive capability of the modeling has been validated on various test cases of Ti64 in our lab.  In a recent modeling competition sponsored by DARPA, thorough verifications on an Inconel 718 part has been compared with a set of detailed experimental data of Penn State University.  Good agreement is achieved, and our team has won the 1^st prize.

Biographical Sketch

Professor Yao received his Ph.D. from U.C. Berkeley in 1974. He worked at Argonne National Lab for 3 years and joined Carnegie Mellon University in 1977.  He also served as the Pao YuKang Chaired professor at the ZheJiang University in China since 2010. Prof. Yao has conducted research of multi-phase systems over 30 years.  He performed research on boiling, spray, and cooling of electronics. Recently he has focused on MEMS micro thermal systems and modeling of additive manufacturing of metal products. 

Dr. Yao is a FELLOW of the ASME and served as the chairman of Fire and Combustion Committee and the Long Range Planning Committee previously.  He has organized various national and international conferences. He has also served twice as the interim Head of the Mechanical Engineering Dept. at CMU.

時間：2019年1月15日(星期二)下午1:30pm

地點：清華大學工程一館301會議室