Next Article in Journal
Nanoindentation of Aluminum Single Crystals: Experimental Study on Influencing Factors
Previous Article in Journal
Influence of Alloyed Ga on the Microstructure and Corrosion Properties of As-Cast Mg–5Sn Alloys
Previous Article in Special Issue
Modelling Microstructural Deformation and the Failure Process of Plastic Bonded Explosives Using the Cohesive Zone Model
Open AccessArticle

Microstructural Influences on Fracture at Prior Austenite Grain Boundaries in Dual-Phase Steels

Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
Author to whom correspondence should be addressed.
Materials 2019, 12(22), 3687; (registering DOI)
Received: 12 October 2019 / Revised: 30 October 2019 / Accepted: 6 November 2019 / Published: 8 November 2019
(This article belongs to the Special Issue Micromechanics: Experiment, Modeling and Theory)
Dual phase (DP) steels provide good strength and ductility properties. Nevertheless, their forming capability is limited due to the damage characteristics of their constituting microstructural phases and interfaces. In this work, a specific type of interface is analysed, i.e., prior austenite grain boundaries (PAGBs). In the literature, prior austenite grain boundary fracture has been reported as an important damage mechanism of DP-steels. The influence of the morphology of phase boundaries near the PAGB and the role of the martensite substructure in the vicinity of a PAGB on damage initiation is analysed. The experimentally observed preferred sites of crack nucleation along the PAGB are assessed and clarified. A finite strain rate dependent crystal plasticity model accounting for the anisotropic elasto-plasticity of martensite (and also ferrite) was applied to an idealized volume element approximating a typical small-scale PAGB microstructure. The boundary value problem is solved using a fast Fourier transform (FFT) based spectral solver. The role of crystallography and geometrical features within the volume element is studied using simulations. Results are discussed considering possibly dominant regimes of elasticity and plasticity. View Full-Text
Keywords: DP steels; prior austenite grain boundaries; martensite variants DP steels; prior austenite grain boundaries; martensite variants
Show Figures

Figure 1

MDPI and ACS Style

Sharma, L.; Peerlings, R.H.J.; Geers, M.G.D.; Roters, F. Microstructural Influences on Fracture at Prior Austenite Grain Boundaries in Dual-Phase Steels. Materials 2019, 12, 3687.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop