Mechanical Behavior of Magnesium Alloys 

Prof. Yanyao Jiang, University of Nevada, Reno, USA

15:00-16:00,  June 13, 2023

Room 308, Xu Zuyao Building

Biography

Yanyao Jiang is Professor in the Mechanical Engineering Department at the University of Nevada, Reno (UNR), and is currently on leave at Zhejiang University of Technology. He 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 has done pioneering research on the inhomogeneous cyclic plastic deformation and ratcheting deformation.

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.  

Abstract

The talk will focus on the different mechanical behavior of magnesium alloys from that of the conventional metals due to deformation twins and material anisotropy in the magnesium alloys. We will discuss the characteristic cyclic deformation and fatigue behavior observed on several typical wrought magnesium alloys including wrought 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.