Dislocation Density-Based Simulation of Pre-Mixed Jet Effects on Residual Stress and Cell Size in 18grnimo7-6 Alloy Steel

Abstract

Highlights1. A finite element model was developed based on a dislocation density constitutive relationship, incorporating with a fully coupled stress integration algorithm, to simulate pre-mixed jet strengthening in 18GrNiMo7-6 alloy steel.2. The dislocation density constitutive parameters were optimized through a genetic algorithm.3. The effects of pre-mixed jet process parameters were thoroughly investigated on residual stress, dislocation density, and cell size in 18GrNiMo7-6 alloy steel.

Keywords: Pre-mixed jet, dislocation density, Residual stress, grain refinement, dislocation cell