|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fracture Properties and Residual Stresses in Small Dimensions
||Enhanced Fracture Toughness of Mg/Nb Laminated Composites
||Nan Li, Youxing Chen, Siddhartha Pathak, Jian Wang, Jon Kevin Baldwin, Amit Misra, Nathan Mara
|On-Site Speaker (Planned)
Enhancing fracture toughness of Mg alloys has been actively investigated due to its huge potential as structural materials in the aerospace and automotive industries. However, Mg and its alloys, with a hexagonal close packed structure, present lacked ductility and poor deformability. Therefore, it is still challenging to improve the deformability while maintaining the high flow strength of Mg and Mg alloys. Here, we propose to use Mg/Nb laminated composites to enhance the fracture toughness, in which a high density of interfaces are designed and manufactured to enhance both the yield strength and ductility. The mechanical strength of the Mg/Nb multilayers measured from pillar compression achieve a high value of ~1.1 GPa. In situ three-point bending experiments have been performed in a SEM. Mg/Nb interfaces play a dominant role to block crack propagation and blunt crack tip.