Influence of alkaline earth metals on structure formation and magnesium alloy properties
Authors:
- Vadym Shalomeev,
- Galyna Tabunshchyk,
- Viktor Greshta,
- Marek Nykiel,
- Kinga Korniejenko
Abstract
The main aim of this work is to improve the structure and properties of the magnesium alloy ML5 by modifying it with alkaline earth metals (ALM). The separate and joint influence of calcium and barium on the macrostructure and microstructure of the alloy of Mg-Al-Zn system was investigated. The qualitative and quantitative estimation of the structural components was carried out. Alkali earth metals were included in complex intermetallic phases and serve as additional crystallization centers. Modification of magnesium alloys with alkaline earth metals is established in an amount of 0.05 to 0.1 wt. % increased the bulk percentage of intermetallic phases by ~1.5 times, shifting them towards smaller size groups while simultaneously forming spherical intermetallic phases located in the grain centre and serving as additional crystallization centers. In this case, grain size reduction and significant refinement of the alloy structural components were provided. The dependency of the separate and joint influence of alkali earth metals on the castings complex of properties of the magnesium alloy has been established. Thus, a separate modification of the ML5 alloy provided the maximum level of its strength and ductility with the addition of 0.1% Ca or Ba. The modification of the complex (0.1% Ca + 0.1% Ba) of the magnesium alloy decreased the dimensions of its structural components 1.5 times and increased the strength of the alloy by 20%, the ductility by 2 times and the long-term heat resistance 1.5 times due to the formation of the intermetallic phases of the complex composition. Linear dependences were obtained that describe the influence of the characteristics of the structural components of the modified magnesium alloy on its mechanical properties. The developed technology for modifying cast magnesium alloys with alkaline earth elements provides an improvement in casting quality and allows the reliability and durability of responsible casting operation.
- Record ID
- CUTf5586b12da164828b5fedbbd11ae7654
- Publication categories
- ;
- Author
- Journal series
- Materials, ISSN , e-ISSN 1996-1944, Biweekly
- Issue year
- 2022
- Vol
- 15
- No
- 12
- Pages
- [1-10]
- Article number
- 4341
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 8-10; Bibliografia (liczba pozycji) - 42; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 15, Iss. 12, Spec. Iss.
- Substantive notes
- Special Issue: Research and Development in Magnesium Alloys for Industrial and Biomedical Applications
- Keywords in English
- magnesium alloy, alkali earth metal, intermetallic, modification, heat resistance, micro grain, mechanical property
- ASJC Classification
- DOI
- DOI:10.3390/ma15124341 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/15/12/4341 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTf5586b12da164828b5fedbbd11ae7654/
- URN
urn:pkr-prod:CUTf5586b12da164828b5fedbbd11ae7654
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