Introduction générale aux techniques d'imagerie

in Techniques de l'Industrie Minérale (2001), 12

Effect of alumina and titanium nitrides inclusions on mechanical properties in high alloyed steels

in Proceedings of the MSMF-3 International Conference (2001)

every commercial steel product in varying amounts. Since inclusions significantly influence properties and behaviour of materials and at the same time give indications on the quality of the steel, it is ... [more ▼]

every commercial steel product in varying amounts. Since inclusions significantly influence properties and behaviour of materials and at the same time give indications on the quality of the steel, it is quite interesting to precise their nature and their origin. In this paper concerning a project involved in the COST 517 framework, studied alloys are high alloy steels. The raw materials were obtained from the conventionally electrical cast ingot and the Electro Slag Refining processes. The purpose is to compare various inclusions produced by these different processes and their effect on the mechanical properties. The raw material because of the melting processes themselves, leads to a product with a good to a great cleanliness, and tiny inclusions, which are haphazardly distributed. The actual ASTM E45 chart seems to be inappropriate, as the inclusions founded are too small in size. Therefore, we manage to develop a specific procedure for the study of such inclusions. The different types of inclusions encountered are oxides, titanium nitrides, and manganese sulphides. Studying the effect on mechanical properties, oxides often seem to initiate fatigue fracture. [less ▲]

Multiradial Imaging in Optical Ore Microscopy

in Proceedings - Annual Meeting - Belgian Soc. Microscopy (2001)

Multispectral Imaging in Cathodoluminescence Microscopy

in Proceedings - Annual Meeting - Belgian Soc. Microscopy (2001)

Image analysis of carbides in high speed steel rolls and their relationship with the mechanical properties

in Proceedings of the Euromat Metallographic Conference, Progress in Metallography (2001)

Image analysis is used to describe quantitatively various different natures of carbides in high speed steel rolls. After an etching judiciously selected, the identification and the extraction of the ... [more ▼]

Image analysis is used to describe quantitatively various different natures of carbides in high speed steel rolls. After an etching judiciously selected, the identification and the extraction of the carbide types are based on spectral differences. For every carbide type, three parameters are measure : the size, the spatial distribution and the volume fraction. The size of martensite grain is also measured. [less ▲]

Moving from colour to multispectral digital imaging in optical microscopy

in NvvM Jaarboek (2000)

A geological information system for paleoseismological data retrieving and analysis

in Proceedings Paleosis (2000)

Reconciliation of visual charts and image analysis in measuring the abrasion of particles

in Proceedings BioGeoVision 99 (1999)

Development of specific acquisition techniques for field imaging - Applications to outcrops and marbles

in Proceedings of GeoVision 99 (1999)

Modal image analysis of metallic sulphides in core samples - a critical test of the methodology

in Proceedings of GeoVision 99 (1999)