|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Ultrafine Grained Materials IX
||A Simple Mechanical Model for Grain Boundary Sliding that Accounts for the Effect of Size Distribution of Grains on the Yield Strength at Quasistatic and Dynamical Loading
||Elijah N Borodin, Alexander E Mayer
|On-Site Speaker (Planned)
||Elijah N Borodin
A mechanical model for barrier resistance to grain boundary sliding has been proposed. At quasi-static deformation, the yield strength is determined by barrier resistance, and the predicted threshold stresses are in good agreement with the experimental data.
Dependences of the yield strength of metals on the grain size and the dispersion of the grain size are discussed for quasistatic and dynamic conditions of loading. In these two cases, the size distribution of grains influences in different ways on the slope of the Hall-Petch curve.
The effect of the grain boundary sliding on the structure of the shock wave front in thin metal foils is investigated by means of numerical simulation.
This study was supported by grants of the President of the Russian Federation (MD-286.2014.1), and the Ministry of Education and Science of the Russian Federation (competitive part of State Task of NIR CSU No. 3.1334.2014/K).