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The assessment of castings quality using selected quantitative methods

Kucharikova L., Tillova E., Zavodska D.

Production Engineering Archives

2016

Vol. 13, No. 4

7--10

Aluminium alloys represent an important category of materials due to their high technological value and wide range of applications. The alloys of the Al-Si-Cu system have become increasingly important in recent years, mainly in automotive industry that uses secondary aluminium (recycled) in the form of various motor mounts, pistons, cylinder heads, heat exchangers, air conditioners due to their high strength at room and high temperature. This work deals with possibilities of quick and correct assessment of aluminium castings microstructure, especially focused on volume, size and shape of structural parameters – eutectic Si and intermetallic phases different chemical compositions. These structural parameters affect the properties of castings and it is important to study their features. The features were studied by using image analyser software NIS Elements.

New possibilities of light microscopy research resulting from digital recording of images

Szczotok A., Roskosz S.

Materials Science Poland

2005

Vol. 23, No. 2

559--565

New research possibilities related to recent improvements in light microscopy are discussed. New research microscopes are fully automated and motorized. All functions, such as those connected with focusing or stage positioning, can be controlled with a PC. Techniques which combine images recorded at different locations on X, Y and Z axes are presented. The first technique - combining high resolution single images, made in X and Y axes on the surface of a specimen, creates overview images of specimens. This is particularly important in quantitative materialography because the technique produces a significant decrease in the edge effect. Examples of applications of PC controlled X-Y stage and stage management software in the study of a duplex steel, made from Ni-base superalloy and welding are presented. Automatic alignment of images made in applications of this technique in the study of a zinc layer on cast iron and thermal barrier coatings on a heat-resisting alloy are shown.