Identification of microscale strain fields from in-situ SEM images of a pearlitic steel using DIC
Preprint, 2014

By using a standard type of DIC framework two series of \textit{in-situ} SEM images (1200x and 2000x) of a pearlitic steel are analyzed. The variations of the intensity field corresponding to the morphological variations (cementite lamellae embedded in a ferrite matrix) of the material are used as a natural speckle. Two traceability indicators are proposed which can be combined to a quality measure of the subsets. These indicators are the foundation of a proposed method that can be used to identify high-quality subsets within a domain of interest. The accuracy of the employed framework is evaluated using synthetically deformed images. Finally, the possibility to correlate the obtained results to variations of the microstructure are investigated.

2D-DIC

Pearlite

natural speckle

in-situ SEM

traceability indicators

Multiscale modeling

Författare

Erik Lindfeldt

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Johan Ahlström

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Magnus Hörnqvist Colliander

Chalmers, Teknisk fysik, Materialens mikrostruktur

Ru Peng

Ämneskategorier

Maskinteknik

Styrkeområden

Transport

Materialvetenskap

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)