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Possible segregation caused by centrifugal titanium casting

K Watanabe1, S Okawa, M Kanatani

  • 1Department of Dental Materials and Technology, Niigata University School of Dentistry, EMX Laboratory.

Dental Materials Journal
|December 1, 1996
PubMed
Summary

Centrifugal casting can cause segregation in molten titanium with platinum additions. However, Ti-6Al-4V alloy showed no macroscopic segregation, indicating minimal body-force segregation in this titanium alloy under tested conditions.

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Area of Science:

  • Materials Science
  • Metallurgy
  • Solidification Science

Background:

  • Centrifugal casting is utilized for producing high-integrity metal components.
  • Understanding segregation phenomena is crucial for controlling alloy properties.
  • Titanium alloys, particularly Ti-6Al-4V, are vital in aerospace and biomedical applications.

Purpose of the Study:

  • To investigate the potential for segregation during centrifugal casting of titanium.
  • To evaluate the influence of centrifugal force on elemental distribution in titanium alloys.
  • To determine if body-force segregation occurs in Ti-6Al-4V during centrifugal casting.

Main Methods:

  • Utilized an electron probe microanalyzer (EPMA) for elemental analysis.
  • Performed elemental distribution mapping and line analysis.

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  • Conducted quantitative analysis of solidified samples.

    • Main Results:

    • Macroscopic segregation was observed when a small amount of platinum was added to molten titanium.
    • Segregation occurred even with a minimal density difference of 0.1 g/cm³.
    • No macroscopic segregation was detected when casting Ti-6Al-4V alloy.

    Conclusions:

    • Centrifugal forces in the tested casting machine are significant enough to induce segregation in certain titanium-platinum systems.
    • The Ti-6Al-4V alloy demonstrated resistance to macroscopic segregation under the applied centrifugal forces.
    • Body-force segregation is unlikely to be a major concern for Ti-6Al-4V during this type of centrifugal casting process.