TitleStructural Aspects of Remelting of the AZ91 Magnesium Alloy Surface Layer
Journal titleArchives of Foundry Engineering
KeywordsStructure ; Magnesium alloy ; Laser remelting
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.
In this study, modification of the AZ91 magnesium alloy surface layer with a CO2 continuous wave operation laser has been taken on. The
extent and character of structural changes generated in the surface layer of the material was being assessed on the basis of both macro- and
microscopy investigations, and the EDX analysis. Considerable changes in the structure of the AZ91 alloy surface layer and the
morphology of phases have been found. The remelting processing was accompanied by a strong refinement of the structure and a more
uniform distribution of individual phases. The conducted investigations showed that the remelting zone dimensions are a result of the
process parameters, and that they can be controlled by an appropriate combination of basic remelting parameters, i.e. the laser power, the
distance from the sample surface, and the scanning rate. The investigations and the obtained results revealed the possibility of an effective
modification of the AZ91 magnesium alloy surface layer in the process of remelting carried out with a CO2 laser beam.
PublisherThe Katowice Branch of the Polish Academy of Sciences
TypeArtykuły / Articles
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