|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Multiscale Architectured Materials (MAM II): Tailoring Mechanical Incompatibility for Superior Properties
||Fatigue Behavior of Gradient Nanograined Cu
||Qingsong Pan, Lei Lu, Jianzhou Long
|On-Site Speaker (Planned)
Majority of engineering metals in service suffer from fatigue failure under cyclic loading; however, trade-off between high-cycle and low-cycle fatigue properties prevails for coarse grained (CG) and nanostructured metals, like their strength and ductility trade-off. Here, we report the fatigue behavior of a gradient nano-grained Cu with spatial grain size gradient from nanograin at the top surface to coarse grain in the core under constant stress-controlled and strain-controlled tension-compression fatigue tests, respectively. A synergy increment of fatigue limit and fatigue life was observed in the gradient nanograined Cu, comparing with that of CG-Cu samples. The underlying cyclic stress/strain response associated with the stability of microstructure from top nanograined surface to coarse grained core, confinement of gradient structure, accumulated plastic strain will be discussed.