Damage and fracture of dual-phase steels: Influence of martensite volume fraction
Langue
en
Article de revue
Ce document a été publié dans
Materials Science and Engineering: A. 2015, vol. 646, p. 322-331
Elsevier
Résumé en anglais
The influence of the martensite volume fraction (Vm) on the damage and fracture behavior of dual-phase steels was studied by combining experiments and micromechanical modeling. A transition in the dominating damage mechanism ...Lire la suite >
The influence of the martensite volume fraction (Vm) on the damage and fracture behavior of dual-phase steels was studied by combining experiments and micromechanical modeling. A transition in the dominating damage mechanism is observed when varying Vm. Martensite fracture dominates the void nucleation process at high Vm, while interface decohesion prevails at low Vm. Damage accumulation accelerates when Vm increases, resulting in a decrease of the fracture strain. Brittle fracture areas are observed in uniaxial tensile specimens for a sufficiently high Vm. The damage mechanisms and evolution are rationalized using a micromechanical analysis based on periodic finite element cell calculations. The results show that Vm is a key factor for controlling the balance between strength and fracture resistance.< Réduire
Mots clés en anglais
Dual-phase steels
Damage
Fracture
Origine
Importé de halUnités de recherche