|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||Ultra-fine Laminated Mg/Nb Composites Produced via Accumulative Roll Bonding
||Marko Knezevic, Daniel Savage, Nathan A Mara, Sven C Vogel, Rodney J McCabe, Irene J Beyerlein
|On-Site Speaker (Planned)
Phase interfaces within interface-dominated, immiscible hexagonal close-packed/body-centered cubic (HCP/BCC) materials can result in an extraordinary combination of strength and ductility, a significant improvement compared to those of the constituent phases. This paper demonstrates the potential to convert a Mg alloy sheet with limited formability and strength into a much more formable and stronger material when it is processed into an ultrafine-layered bimetallic sheet. To this end, the severe plastic deformation technique accumulative roll bonding was used to refine stacks of high-purity BCC Nb and HCP 4-5wt% Li-Mg alloy sheet from mm polycrystalline layers to um size layers consisting of a single grain through thickness. To offer insights into the role of temperature and strain-rate in large strain rolling of Mg based multilayer composites, we present the evolution of microstructure, texture, and strength of this unique material for several processing paths.
||Planned: Supplemental Proceedings volume