TitleFormation of Structure and Properties in Casting Processes on the Example of AZ91 Magnesium Alloy
Journal titleArchives of Foundry Engineering
KeywordsInnovative foundry technologies and materials ; Magnesium Alloy ; RS process ; VDC process ; Mechanical properties
Divisions of PASNauki Techniczne
Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:
- Theoretical Aspects of Casting Processes,
- Innovative Foundry Technologies and Materials,
- Foundry Processes Computer Aiding,
- Mechanization, Automation and Robotics in Foundry,
- Transport Systems in Foundry,
- Castings Quality Management,
- Environmental Protection.
Contemporary materials engineering requires the use of materials characterised by high mechanical properties, as these precisely
properties determine the choice of material for parts of machinery and equipment. Owing to these properties it is possible to reduce
the weight and, consequently, the consumption of both material and energy. Trying to meet these expectations, the designers are
increasingly looking for solutions in the application of magnesium alloys as materials offering a very beneficial strength-to-weight ratio.
However, besides alloying elements, the properties are to a great extent shaped by the solidification conditions and related structure.
The process of structure formation depends on the choice of casting method forced by the specific properties of casting or by the specific
intended use of final product. The article presents a comparison of AZ91 magnesium alloys processed by different casting technologies.
A short characteristic was offered for materials processed by the traditional semi-continuous casting process, which uses the solidification
rates comprised in a range of 5 - 20⁰C/s, and for materials made in the process of Rapid Solidification, where the solidification rate can
reach 106 ⁰C/s. As a result of the casting process, a feedstock in the form of billets and thin strips was obtained and was subjected next
to the process of plastic forming. The article presents the results of structural analysis of the final product. The mechanical properties
of the ø7 mm extruded rods were also evaluated and compared.
PublisherThe Katowice Branch of the Polish Academy of Sciences
TypeArtykuły / Articles