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Seminar - Metallic glasses: From fundamental research to application exploration by Prof. Gang Wang
日期:2017 年 12 月 07 日 ( 星期四)
Time:11:00 am – 12:00 pm
Venue:EF305

Abstract:

Unlike the crystalline metals whose microstructures are basically clear, and property-structure relation is relatively easy to establish, metallic glasses (MGs) without any crystallographic defects usually exhibit a brittle nature. To overcome this, many efforts have been dedicated to understand the deformation mechanism of MGs, and explore the measures to enhance the toughness and ductility of MGs. In this talk, the deformation mechanism of MGs at different conditions, such as high strain-rate loading, cryogenic temperature, and ion- irradiation affections etc., will be introduced. Many in-situ observation techniques were used to characterize the structural evolution of MGs, which includes in-situ tension and compression tests in high-energy X-ray synchrotron source, in-situ crack propagation in high-resolution transmission electron microscope (HRTEM), in-situ strain field observation by digital imaging correlation (DIC) method. The intermittently plastic deformation, the elastic energy dissipation during fracturing, and the crack propagation of MGs will be discussed. Based on the fundamental research results, the potential application of MGs as the shield of space crafts to prohibit the space debris is investigated based on the high-speed collision in light gas accelerator.

Bio-sketch:

Prof. Gang Wang got his bachelor (1999), master (2001) and Ph.D (2005) degrees from School of Materials Science and Engineering, Harbin Institute of Technology (HIT). During his Ph.D project, he was awarded a scholarship from the Australian National University (ANU) to take the student exchange plan (2003-2004). He used to be a post-doctoral fellow working in Institute of Physics, Chinese Academy of Science (2005-2007) and the Department of Industry and System Engineering, the Hong Kong Polytechnic University (PolyU) (2007-2008). Then, he obtained the Humboldt Fellowship to stay in Leibniz Institute for Solid State and Materials Research Dresden (IFW-Dresden), Germany (2008-2010). After that, he was back to Shanghai University and obtained the professorship. He has published more than 140 scientific papers in international journals. The citation of these papers approaches more than 3000 times. His research interests include mechanical behavior, dynamic fracture behavior, synchrotron X-ray investigation of metallic glasses, glassy structural evolution, and deformation mechanism of high-entropy alloys.