|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Multiscale Architectured Materials (MAM II): Tailoring Mechanical Incompatibility for Superior Properties
||Tensile Behaviors of Gradient Nano-grained Copper at 77K
||Xiuyan Li, Xin Zhou, Ke Lu
|On-Site Speaker (Planned)
Gradient nano-grained (GNG) metals were reported to have a much improved tensile ductility at room temperature compared with the homogeneous nano-grained counterparts owing to effective suppression of strain localization. In our study, cryogenic tensile behaviors of GNG Cu samples were investigated by using tensile tests at 77 K, including strength, ductility, and work-hardening rates. An even higher tensile ductility was obtained in the GNG Cu at 77 K than that at ambient temperature. Microstructures of the GNG samples before and after cryogenic tension were characterized by using SEM and TEM. The corresponding plastic deformation mechanism of GNG structures at cryogenic temperature will be analyzed based on the structure and property characterizations.