Microstructural modeling of ductile fracture initiation in multi-phase materials

Abstract

The precise mechanisms underlying the failure of multi-phase materials may be strongly dependent on the material's microstructural morphology. Micromechanical modeling has provided much insight into this dependence, but uncertainties remain about crucial modeling assumptions. This paper assesses the influence of different grain shapes, damage indicators, and stress states using a structured numerical model. A distinct spatial arrangement of phases around fracture incidents is found, consisting of hard regions in the tensile direction interrupted by soft regions in the directions of shear. These key features are only mildly sensitive to the studied variations.

References in corpus (2)

• Microstructural topology effects on the onset of ductile failure in multi-phase materials - a systematic computational approach
• Topology and morphology influences on the onset of ductile failure in a two-phase microstructure

Cited by in corpus (4)

• Competing damage mechanisms in a two-phase microstructure: how microstructure and loading conditions determine the onset of fracture
• Fracture in multi-phase materials: why some microstructures are more critical than others
• Energy-based comparison between the Fourier--Galerkin method and the finite element method
• On the critical role of martensite hardening behavior in the paradox of local and global ductility in dual-phase steels