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Effect of modifying additives of dysprosium titanate on the structure of silumin AK12.
- Source :
-
Metallurgist . Aug2024, Vol. 68 Issue 4, p596-604. 9p. - Publication Year :
- 2024
-
Abstract
- Currently, silumins, which are aluminum alloys, are most widely used in mechanical engineering, construction, and other industries. The use of silumins is often limited due to the presence of large-crystalline structures, such as α-Al dendrites, needle-shaped crystals of eutectic Si, and intermetallic phases. The effect of various additives on and their relationship with the microstructure and mechanical properties of Fe-containing intermetallic phases (Al–Si–Fe and Al–Si–Fe–Mn) has been studied extensively. However, studies of the effect of various additives on the morphology of Fe-containing phases in industrial Al–Si alloys remain relevant. The effect of small amounts of dysprosium titanate additives (0.01, 0.05, 0.1, 0.5 wt.%) on the morphology and localization of Fe-containing intermetallic phases is studied. Introducing 0.01 wt.% dysprosium titanate causes the transformation of the needle-shaped β-phase to the α-phase in the form of more compact blocks and polyhedral crystals, the size of the α-phase reducing by more than half. The introduction of 0.05, 0.1, and 0.5 wt.% dysprosium titanate does not change the modification of the α- and β-phases and reduces the size of the phases by a factor of 1.5 on average. After the introduction of dysprosium titanate, θ‑Al2Cu particles are dissolved and Cu is concentrated/localized in the Fe-containing intermetallic phases in all the modified alloys. After the introduction of 0.05–0.5 wt.% dysprosium titanate, the tensile strength of AK12 alloys increases due to a decrease in the size of the α- and β-phases. The modification of the Fe-containing intermetallic phases from the β-phase to the α-phase after the introduction of 0.1 wt.% dysprosium titanate decreases the tensile strength and elongation. The optimum is the addition of tungsten in the amount of 0.1 wt.%, as it leads to the optimal ratio between the structure and the mechanical properties. The tensile strength and elongation increase by 23% on average. [ABSTRACT FROM AUTHOR]
- Subjects :
- *COPPER
*ALUMINUM alloys
*DYSPROSIUM
*TENSILE strength
*DENDRITIC crystals
Subjects
Details
- Language :
- English
- ISSN :
- 00260894
- Volume :
- 68
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Metallurgist
- Publication Type :
- Academic Journal
- Accession number :
- 179438900
- Full Text :
- https://doi.org/10.1007/s11015-024-01763-w