(6月9日9:00)Recent Developments in 3D Printing Metal Parts
报告题目：Recent Developments in 3D Printing Metal Parts
报告人: Prof. Yuebin Guo
Dept. of Mechanical Engineering. The University of Alabama.
Laser additive manufacturing (AM) such as selective laser melting (SLM) and laser metal deposition (LMD) has distinct characteristic in geometry freedom and draws great attentions in tool, aerospace, automotive, biomedical, and energy industries. However, the complex thermo-physical phenomena including moving heat flux, dynamic melt pool, rapid cooling and solidification during an AM process cause great concerns regarding surface integrity and distortion which have significant impacts on part functionality (e.g., dimension accuracy and fatigue). This seminar will first present the recent developments of SLM and LMD, hardware, design and data preparation. Then, the recently developed adaptive process strategy is demonstrated to show its advantages to the traditional scanning strategies. Next, the microstructure evolution of Inconel 625 alloy is characterized from selective laser melting to heat treatment. In the last, two efficient multi-physics predictive tools, i.e., stress-thread and temperature-thread based multiscale modeling approaches, will be shown to predict residual stress and part distortion of SLMed practical parts at different scanning strategies via thermal loading subroutine and material states variables. In addition, an outlook for the integrated computational material engineering (ICME) with SLM is discussed.
Dr. Yuebin Guo is a Professor of Mechanical Engineering and funding Director of Consortium for Surface Integrity and Functionality at The University of Alabama. He received his Ph.D. and M.S. degrees in advanced manufacturing from Purdue University and UC-Berkeley, respectively. He has been internationally recognized for his seminal research contributions to the development, understanding, and control of process−surface integrity−functionality relationships in various manufacturing processes, which has produced significant impacts in manufacturing science and engineering. Dr. Guo is an author of 300+ peer-refereed technical publications. He has received the prestigious SME Outstanding Young Manufacturing Engineer Award, SAE Teetor Educational Award, NSF CAREER Award, Tau Beta Pi Outstanding Faculty Award, Humboldt Research Award for experience scientists, and Changjiang Endowed Guest Chair Professor. He is an elected Fellow of ASME, SME, AvH, ISNM, and a member of CIRP.