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  5. In-situ reinforcement of Aluminium casting alloys

In-situ reinforcement of Aluminium casting alloys

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In-situ reinforcement of Aluminium casting alloys

The development of Aluminum alloys mainly tends to increase the strength without worsening the ductility. Beside strength an increase in stiffness is also sought. In contrast to strength with Aluminium casting alloys the stiffness can be influenced by alloying to a very small extent only. A substantial increase in stiffness is possible by metal matrix composits. But poor wettability between the metal matrix and the ceramic particels and big differences in the thermal expansion lead to poor mechanical properties. One possible approach to solve these problems is using intermetallics based on Aluminium as reinforcement. These phases have a low density and a good wettability with the Aluminium matrix. Moreover, these phases can be produced by an in-situ reaction in the aluminum melt. The volume fraction of the reinforcing phase increases with this reaction. A special stirring technique ensures that the reinforcing phase is finely divided and the matrix solidifies fine-grained.

Contact:

M.Sc. Peter Randelzhofer

Principle of in-situ reinforcement of cast aluminum
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Simulation of the particle distribution during the stirring process
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Microstructure of in-situ reinforced pure aluminium
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Young's modulus of in-situ reinforced pure aluminium at different process parameters
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Example of mechanical properties of in-situ reinforced pure aluminium
(Enlarge)
Principle of in-situ reinforcement of cast aluminum
Simulation of the particle distribution during the stirring process
Microstructure of in-situ reinforced pure aluminium
Young's modulus of in-situ reinforced pure aluminium at different process parameters
Example of mechanical properties of in-situ reinforced pure aluminium

Publications:

  • Himmler D.:
    Steifigkeitserhöhung von Aluminium-Druckgusslegierungen durch in-situ gebildete Al3Ti-Partikel - Prozesstechnologie und Charakterisierung (Dissertation, 2023)
  • Himmler D., Randelzhofer P., Körner C.:
    In-situ Al3Ti particle reinforcement for stiff aluminum die castings
    In: Journal of Alloys and Compounds (2022), Article No.: 163984
    ISSN: 0925-8388
    DOI: 10.1016/j.jallcom.2022.163984
  • Gruber D.:
    Halbautomatische Herstellung und Eigenschaften von in situ Al3Ti-verstärkten Aluminiumgusslegierungen im Druckgießen
    In: Giesserei 02/2021 (2021), p. 61
    ISSN: 0016-9765
  • Himmler D., Randelzhofer P., Körner C.:
    Formation kinetics and phase stability of in-situ Al3Ti particles in aluminium casting alloys with varying Si content
    In: Results in Materials (2020)
    ISSN: 2590-048X
    DOI: 10.1016/j.rinma.2020.100103
  • Zeng Y., Himmler D., Randelzhofer P., Körner C.:
    Processing of in situ Al3Ti/Al composites by advanced high shear technology: influence of mixing speed
    In: International Journal of Advanced Manufacturing Technology 110 (2020), p. 1589-1599
    ISSN: 0268-3768
    DOI: 10.1007/s00170-020-05956-w
  • Zeng Y., Himmler D., Randelzhofer P., Körner C.:
    In situ Al3Ti/Al composites fabricated by high shear technology: microstructure and mechanical properties
    In: Materials Science and Technology 35 (2019), p. 2294-2303
    ISSN: 0267-0836
    DOI: 10.1080/02670836.2019.1677025
  • Zeng Y.:
    In-situ Al3Ti/Al composites produced by high shear technology: microstructure and mechanical properties (Dissertation, 2019)
  • Zeng Y., Himmler D., Randelzhofer P., Körner C.:
    Microstructures and Mechanical Properties of Al3Ti/Al Composites Produced In Situ by High Shearing Technology
    In: Advanced Engineering Materials (2018)
    ISSN: 1438-1656
    DOI: 10.1002/adem.201800259



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