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Journal of Materials Science

, Volume 30, Issue 20, pp 5185–5191 | Cite as

Influence of silicon in aluminium on the mechanical properties of titanium/aluminium friction joints

  • A. Fuji
  • K. Ameyama
  • T. H. North
Article

Abstract

The influence of post-weld heat-treatment and of residual silicon in aluminium on the mechanical properties of dissimilar friction joints between titanium and aluminium was investigated. Although joint tensile strength and bend test properties were drastically reduced following post-weld heat treatment, the responses of Ti/h.p. Al and Ti/c.p. Al joints were quite different. The tensile strength and bend test properties of Ti/h.p. Al joints were markedly decreased by heat-treatments involving shorter holding times at lower temperatures.

Joint failure in post-weld heat-treated joints was associated with Al3Ti formation at the bondline region. The growth rate of the Al3Ti intermetallic layer at the joint interface was much faster in post weld heat-treated Ti/h.p. joints. More than 20 at%Si segregated in the region between the titanium substrate and the Al3Ti intermetallic phase in heat-treated Ti/c.p. Al joints. It is suggested that silicon segregation retards Al3Ti formation by acting as a barrier to titanium and aluminium diffusion at the joint interface.

Keywords

Tensile Strength Al3Ti Friction Joint Intermetallic Layer Titanium Substrate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • A. Fuji
    • 1
  • K. Ameyama
    • 2
  • T. H. North
    • 3
  1. 1.Department of Mechanical EngineeringKitami Institute of TechnologyHokkaidoJapan
  2. 2.Department of Mechanical EngineeringRitsumeikan UniversityShigaJapan
  3. 3.Department of Metallurgy and Materials ScienceUniversity of TorontoTorontoCanada

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