Journal of Materials Science

, Volume 43, Issue 2, pp 748–758

Microstructural evolution and mechanical property in dual two-phase intermetallic alloys composed of geometrically close-packed Ni3X (X: Al and V) containing Nb

  • Yasuyuki Kaneno
  • Wataru Soga
  • Hiroshi Tsuda
  • Takayuki Takasugi
Article
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Abstract

Dual two-phase intermetallic alloys composed of geometrically close-packed (GCP) structures of Ni3Al (L12) and Ni3V (D022) containing Nb were investigated in terms of microstructural evolution during low-temperature annealing (aging) and the related mechanical properties. The eutectoid region, i.e. the prior Al phase (Ni solid solution) is composed of the lamellar-like structure consisting of Ni3Al (L12) and Ni3V (D022) even at an early aging stage, and then coarsen with increasing aging time. The lamellar-like structure tend to align along \( \langle {\text{001}}\rangle \) direction and on {001} plane in the prior A1 phase (or the L12 phase). In a wide range of temperature, the dual two-phase intermetallic alloys showed high yield and tensile strength, and also reasonable tensile ductility, accompanied with ductile fracture mode. The observed mechanical properties were less sensitive to the microstructural evolution during low-temperature annealing (aging), meaning that the present dual two-phase intermetallic alloy is promising for a new type of high-temperature structural material.

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Yasuyuki Kaneno
    • 1
  • Wataru Soga
    • 1
  • Hiroshi Tsuda
    • 1
  • Takayuki Takasugi
    • 1
    • 2
  1. 1.Department of Materials Science, Graduate School of EngineeringOsaka Prefecture UniversitySakaiJapan
  2. 2.Osaka Center for Industrial Materials Research, Institute for Materials ResearchTohoku UniversitySakaiJapan

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