|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||Mechanical Properties of Mg-3%Gd with a Heterogeneous Lamella Structure
||Guilin Wu, Xuan Luo, Zongqiang Feng, Tianlin Huang, Xiaoxu Huang
|On-Site Speaker (Planned)
A recent study demonstrated that high strength and high ductility were obtained simultaneously in a Ti sheet with a heterogeneous lamella structure  produced by asymmetrical rolling and annealing. In the present work, a Mg-3%Gd alloy was processed by accumulative roll-bonding (ARB) and subsequent annealing, which generated a similar heterogeneous lamella structure composed of alternating layers of fine grains and coarse grains. This alloy showed an increase in strength by a factor of 1.9 and a comparable tensile ductility as compared with a fully annealed counterpart with a coarse-grain structure. This good combination of strength and ductility was attributed to the contributions of back stresses, which are associated with the unique lamella structure and evolved with tensile strain, to the strengthening and work hardening.
 X.L. Wu, M.X. Yang, F.P. Yuan, G.L. Wu, Y.J Wei, X.X Huang, Y.T Zhu. Proceeding of the National Academy of Science (PNAS), USA 112 (2015) 14501-14505.
||Planned: Supplemental Proceedings volume