Motores de reacción modernos por turbinas de gas

This Bachelor’s thesis investigates the different types of jet engines used nowadays, their performance and applications. The thesis includes a general study of dynamics of fly, engine thermodynamics and contamination.

Terästen standardinmukaiset seosainepitoisuudet ja niiden vaihteluiden vaikutus hitsattavuuteen

Työssä selvitetään tiettyjen terästen hitsattavuutta.

Modern Metallic Materials for Arctic Environment

This thesis is part of the Arctic Materials Technologies Development –project, which aims to research and develop manufacturing techniques, especially welding, for Arctic areas. The main target of this paper is to clarify what kind of European metallic materials are used, or can be used, in Arctic. These materials include mainly carbon steels but also stainless steels and aluminium and its alloys. Standardized materials, their properties and also some recent developments are being introduced. Based on this thesis it can be said that carbon steels (shipbuilding and pipeline steels) have been developed based on needs of industry and steels exist, which can be used in Arctic areas. Still, these steels cannot be fully benefited, because rules and standards are under development. Also understanding of fracture behavior of new ultra high strength steels is not yet good enough, which means that research methods (destructive and non-destructive methods) need to be developed too. The most of new nickel-free austenitic and austenitic-ferritic stainless steels can be used in cold environment. Ferritic and martensitic stainless steels are being developed for better weldability and these steels are mainly developed in nuclear industry. Aluminium alloys are well suitable for subzero environment and these days high strength aluminium alloys are available also as thick sheets. Nanotechnology makes it possible to manufacture steels, stainless steels and aluminium alloys with even higher strength. Joining techniques needs to be developed and examined properly to achieve economical and safe way to join these modern alloys.

Ateismin ongelmia : uutta ja vanhaa

Kirjallisuusarvostelu

Fysiikka ja usko

Kirjallisuusarvostelu

Hegemoniataistelun haaste : Raoul Palmgren ja kadotettu perspektiivi

Kirjallisuusarvostelu

Tieteellinen realismi Niiniluodon tapaan

Kirjallisuusarvostelu

Ihminen kulttuurieläimenä

Kirjallisuusarvostelu

Tiede kutsumuksena ja tehokkuutena

Kirjallisuusarvostelu

Kaikki Afganistanin sodat

Kirjallisuusarvostelu