報告題目：Cyclic Deformation and Fatigue of Magnesium Alloys

報告人：Yanyao Jiang

主持人（邀請人）：陳鵬

報告時間：7月31日上午10:00-11:30

報告地點：塑性與超塑性研究所學術報告廳

主辦單位：未來科學國際⏭➰聯合實驗室，汽車材料教育部重點實驗室，伟德bv1946官网

摘要：

Magnesium is the fourth most common element on the Earth and is a green material due to its lightweight, nontoxicity, and recyclability. With two-thirds the density of aluminum, magnesium alloys are the lightest metals that can be used for load-bearing structures. A wrought magnesium alloy, either rolled or extruded, differs from a conventional metal in two major aspects: deformation twins and material anisotropy. The current presentation will cover characteristic cyclic deformation and fatigue behavior observed on several typical wrought magnesium alloys including AZ31B, AZ61A, AZ90, and ZK60. Interesting and unique phenomena in magnesium alloys will be shared with experimental results, and those observations include the anisotropic deformation behavior, tension-compression asymmetry, material orientation- and amplitude-dependent deformation and fatigue behavior, and the Swift effect. Discussions will be made on the roles of the combined effects of deformation twins and dislocations on the observed deformation and fatigue behavior in the magnesium alloys.

報告人簡介：

Yanyao Jiang received his B.S. degree in Mechanical Engineering at the Northeast University in China in 1983, M.S. degree in Solid Mechanics from the Zhejiang University in 1996, and Ph.D. degree in the Department of Mechanical Engineering at the University of Illinois at Urbana-Champaign in 1993. Professor Jiang has been studying cyclic plasticity, fatigue and fracture, rolling contact, and durability of bolted joints. His research work has led to an understanding of the relationship between cyclic plasticity and fatigue failure. His approach for crack growth predictions bridges the crack initiation stage and the crack growth stage in fatigue research. Professor Jiang is an ASME Fellow. He was the recipient of the US NSF CAREER award, the Ford University Research Program, the Alexander von Humboldt Foundation Fraunhofer Bessel Research Award, and the Joint Research Fund for Overseas Chinese Young Scholars from the National Natural Science Foundation of China. He served as an Associate Editor of the ASME Journal of Engineering Materials and Technology and is a member of the Editorial Board for the International Journal of Plasticity and the International Journal of Fatigue.