Auto-analysis system for graphite morphology of grey cast iron

Auto-analysis system for graphite morphology of grey cast iron

The current method to classify graphite morphology types of grey cast iron is based on traditional subjective observation, and it cannot be used for quantitative analysis. Since microstructures have a great effect on the mechanical properties of grey cast iron and different types have totally different characters, six types of grey cast iron are discussed and an image-processing software subsys...

Analysis of microstructural strain-fields in grey cast iron

With increasing engine capacity the demand on the material increases. To meet the requirements new more advanced test methods are invented. One of these test methods is the digital image correlation technique (DIC). This method analyses deformations in materials by correlating the displacement in a set of sequentially acquired images. To be able to measure the deformations the material needs to...

Circumferential failures in grey cast iron pipes

Gas explosion model for grey cast iron pipes in Amsterdam

This thesis concerns grey cast iron gas pipelines in Amsterdam managed by the regional gas and electricity grid operator Liander. Due to brittle nature and aging process of grey cast iron, probability of explosion in this type of pipelines seems to be increasing. A model for the gas explosion probability is proposed. Multiple factors are taken into consideration, including pipe’s age, length, w...

Comparative Analysis of Spectral and Spatial Features for Classification of Graphite Grains in Cast Iron

The morphology and the distribution of graphite grains are the decisive factors in judging the properties of the material cast iron. There are six classes of graphite grain morphology defined by ISO-945 through reference drawings for cast iron graphite grain classification. These reference drawings are universally accepted for classification of graphite grains. Many shape representations and re...