题目：Shear band and fracture in bulk metallic glasses
报告人： 戴兰宏 研究员
中国科学院力学所非线性力学国家重点实验室
报告内容摘要：
Bulk metallic glasses (BMGs) have exhibited promising applications in many fields such as aerospace and defense industries due to their unique mechanical properties. However, the poor room temperature (RT) ductility or plasticity of BMGs resulted from shear banding induced fast fracture has become the bottle-neck for limiting their practical engineering applications. Understanding shear banding and fracture behaviors is a key step toward improving the RT ductility of BMGs. The physical origin of shear banding and mechanism of fracture energy dissipation in BMGs are particularly focused on in this talk. In BMGs, it is demonstrated that the free volume softening plays a dominant role in the formation of shear bands, and fracture energy dissipates via competition between the shear transformation zone (STZ) and the tension transformation zone (TTZ).
报告人简介：
Professor Dai Lanhong, born in 1965, received his PhD degree in solid mechanics in 1996 at Institute of Mechanics, Chinese Academy of Sciences (CAS). He joined the Institute of Mechanics, CAS, in 1998 after completing his postdoctoral research work at Department of Mechanics, Peking University. His main research interest includes impact dynamics, mechanical behavior of new materials, and micromechanics of composite materials. He obtained National Science Fund for Distinguished Young Scholars in 2007.

主持人：段慧玲  特聘研究员
时间：11月7日（周五）下午3:00
地点：力学楼434会议室
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