Acoustic Emission Study on Fracture Toughness in Ti-6Al-4V Alloy with Various Acicular α Microstructures

  • S. Mashino
  • T. Kishi
  • T. Horiya
  • H. G. Suzuki


The Ti-6Al-4V alloy is widely used as aerospace structural material. However, the toughness is decreased by increasing strength. It has been reported that the Ti-6Al-4V alloy with coarse acicular α structure has high fracture toughness1,2, but the fracture mechanism of high toughness in coarse acicular α structure has not been fully understood. In Ti alloys, it has been reported that the nucleation, growth and coalescence of voids or microcracks at the tip of main crack influence the fracture process3,4.


Fracture Toughness Acoustic Emission Crack Opening Displacement Water Quench Acoustic Emission Event 
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Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • S. Mashino
    • 1
  • T. Kishi
    • 2
  • T. Horiya
    • 3
  • H. G. Suzuki
    • 3
  1. 1.Engineering Research LaboratoryJapan Tobacco Inc.Hiratsuka, Kanagawa 254Japan
  2. 2.Research Center for Advanced Science and TechnologyThe University of TokyoMegro-ku, Tokyo 153Japan
  3. 3.R & D Laboratories-IINippon Steel CorporationSagamihara, Kanagawa 229Japan

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