中文摘要：

Zhefeng Zhang province in April, was born in Jilin 1970 and received his B.S. and M.S.degrees in the Department of Materials Science and Engineering, Xi＇an Jiaotong University, in 1992 and 1995, respectively. He obtained his Ph.D. in Institute of Metal Research （IMR）, Chinese Academy of Sciences in June 1998. Then, he became an associated professor in August 1999. From September 2000 to September 2001, he worked at Advanced Institute of Science and Tech-nology （AIST）, Sendai, Japan as a JSPS fellow. Since October 2001, he was awarded by Alexander von Humboldt （AvH） foundation working at Institute for Metallic Materials, IFW-Dresden, Germany. From January to December 2003, he visited Max-Planck Institute for Metal Research, Stuttgart, Germany. He then returned to Institute of Metal Research, Chinese Academy of Sciences and became a full professor in January 2004. In January 2005, he was supported by ＂Hundreds of Talent Project＂ of Chinese Academy of Sciences. He was appointed as head of Materials Fatigue and Fracture Division in February 2005. His main research interests include mechanical properties of materials, fatigue damage mechanisms of single- and bi-crystals, fracture and strength theory of high-strength materials, interfacial damage and cracking mechanisms, strengthening mechanisms and ductility of high-performance materials. Recently, he achieved some new research progresses in several aspects including： （1） effects of grain boundaries on cyclic deformation and fatigue damage; （2） fabrication and damage mechanisms of ternary layer ceramics; （3） fracture and strength asymmetries of metallic glassy materials; （4） unified tensile fracture criterion; （5） physical nature of fracture and strength; （6） deformation and strengthening mechanisms of ultrafine-grained materials. Dr. Zhefeng Zhang has published more than 100 papers in international SCI journals, including Phys. Rev. Left., Nature Mater., Acta Mater., Phys. Rev. B, Appl. Phys. Left. etc. His research has be