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Journal of Materials Science

, Volume 42, Issue 2, pp 421–427 | Cite as

The evolution of delta-phase in a superplastic Inconel 718 alloy

  • Yi Huang
  • Terence G. Langdon
Article

Abstract

An Inconel 718 sheet alloy was tested in tension at a temperature of 965°C and an initial strain rate of 10−4 s−1 corresponding to the conditions for optimum superplastic deformation. Detailed observations and quantitative measurements record the evolution of the δ-phase during tensile deformation. The experiments show that the total precipitation of the δ-phase increases with strain but there is a decrease with strain in the number density of the needle/plate δ-phase particles and a corresponding increase with strain in the number density of the blocky/globular δ-phase particles.

Keywords

Strain Rate Sensitivity Superplastic Deformation Initial Strain Rate Ni3Nb Equilibrium Content 
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.

Notes

Acknowledgements

One of the authors (Y. Huang) acknowledges the financial support of the School of Metallurgy and Materials of the University of Birmingham and the Committee of Vice-Chancellors and Principals (CVCP) of the Universities of the United Kingdom for an ORS award. The authors also acknowledge the contributions to this project from Dr. P. L. Blackwell and Dr. M. Strangwood.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.JVM Castings (Tamworth) Ltd.StaffordshireUK
  2. 2.Departments of Aerospace and Mechanical Engineering and Materials ScienceUniversity of Southern CaliforniaLos AngelesUSA
  3. 3.Materials Research Group, School of Engineering SciencesUniversity of SouthamptonSouthamptonUK

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