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Article

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Title

Microscopic Analysis of the Aluminium Castings Produced with the use of Polymer Composite Patterns

Authors

[ 1 ] Instytut Technologii Materiałów, Wydział Inżynierii Mechanicznej, Politechnika Poznańska | [ P ] employee

Scientific discipline (Law 2.0)

[2.9] Mechanical engineering

Year of publication

2022

Published in

Archives of Foundry Engineering

Journal year: 2022 | Journal volume: vol. 22 | Journal number: iss. 3

Article type

scientific article

Publication language

english

Keywords
EN
  • Casting
  • Aluminium alloys
  • Lost-wax method
  • bentonite
  • Digital microscope
Abstract

EN The paper presents a microscopic analysis of the surface and fracture of aluminium castings produced using the lost-wax method for patterns made of a composite material, i.e. polyethylene with the addition of bentonite. Castings are made of AlSi7 aluminium alloy (silumin) in a plaster mould. A new type of polymer waxes enriched with bentonite was used to obtain new composites, minimizing the defects caused by the casting production process. The castings were made in the centrifugal casting process. The prepared plaster moulds were removed from the furnace and poured with liquid aluminium alloy (AlSi7) at 750°C. The surface and fracture of the castings was analysed using an optical digital microscope type VHX-7000 manufactured by KEYENCE. It has been proven that the studied castings feature surface defects (raw surface defects) in the form of high roughness and the presence of bentonite inclusions classified as casting contamination. During the tests, shape defects related to mechanical damage were also detected.

Pages (from - to)

113 - 117

DOI

10.24425/afe.2022.140244

URL

https://journals.pan.pl/dlibra/show-content?id=124481

License type

CC BY (attribution alone)

Open Access Mode

open journal

Open Access Text Version

final published version

Date of Open Access to the publication

at the time of publication

Ministry points / journal

70

Impact Factor

0,6

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