Reporter：Prof. Ting Zhu Woodruff School of Mechanical Engineering Georgia Institute of Technology, Atlanta GA 30332, USA
Time：Wednesday, June 19, 2019 14:30
Location：East 403 meeting room of Civil Building
Introduction of the reporter：Ting Zhu is a professor in the George W. Woodruff School of Mechanical Engineering at Georgia Institute of Technology. He received Ph.D. in Solid Mechanics from Tsinghua University in 1999 and Ph.D. in Mechanical Engineering from Massachusetts Institute of Technology in 2004. He worked as a postdoctoral associate at Harvard University between 2004-2005. He joined Georgia Tech as an assistant professor in fall 2005. His research is focused on mechanics and materials modeling. He received the Sia Nemat-Nasser Early Career Award from the American Society of Mechanical Engineers, the Young Investigator Medal from the Society of Engineering Science.
Introduction：Additive manufacturing, also called three-dimensional (3D) printing, is paving the way toward next industrial revolution. Metal additive manufacturing via a typical laser powder bed fusion technology features the highly localized melting processes, fast cooling rates, and strong temperature gradients. These extreme printing conditions result in highly nonequilibrium microstructures containing complex structural and chemical heterogeneities spanning multiple length scales. Currently, the structure-mechanical-property relationships of 3D-printed metals are not well understood. In this talk, I will present recent progress in the mechanics experiment and modeling of additive manufacturing. I will highlight the integrated synchrotron x-ray experiments and crystal plasticity finite element simulations of microscale internal stresses in additively manufactured stainless steel. Such research is essential to the design, control and optimization of reliable 3D-printed metals for engineering applications.