|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Multiscale Architectured Materials (MAM II): Tailoring Mechanical Incompatibility for Superior Properties
||Stress and Strain Gradients in a Low Carbon Steel Deformed under Heavy Sliding
||Xiaodan Zhang, Niels Hansen, Xiaoxu Huang
|On-Site Speaker (Planned)
A recent study  has shown that a microstructure can be refined to a record low of 5 nm and that dislocation glide is still a controlling mechanism at this length scale. In this study, by heavy rotatory sliding of a low carbon steel a gradient structure has been produced extending to about 2.5 mm below the surface reducing the structural scale to the nanometer dimension and increasing the strength to extreme values by dislocation and boundary strengthening. The microstructure and texture gradient are analyzed and stress and strain gradients produced by plastic deformation are evaluated based on the deformation microstructure using the classic stress-structure relationship. Computational and materials modelling has been advanced from bulk to gradient structures leading to dissemination of constitutive stress-strain equations in gradient structures.  D. A. Hughes and N. Hansen, Exploring the Limit of Dislocation Based Plasticity in Nanostructured Metals, PRL 112, 135504 (2014).