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Journal of Materials Science

, Volume 28, Issue 7, pp 1957–1962 | Cite as

Phase transformations and structure-property relationships in a rapidly solidified Ni-Al-Mo alloy

Part II Structure-property relationships
  • Sang Yul Lee
  • P. Nash
Papers

Abstract

In Part I the complex phase transformations occurring on ageing a melt-spun Ni-Al-Mo-V-Re alloy were determined by transmission electron microscopy (TEM). In the present paper, electrical resistivity and microhardness measurements on the aged, melt-spun ribbon are reported and correlated with the TEM studies. An initial increase in electrical resistivity on ageing corresponds to the spinodal ordering transformation. This is followed by precipitation of α(Mo). This also gives rise to an increase in microhardness with ageing time. The activation energy for this process was determined to be 270.8 kJ mol−1, corresponding to the volume diffusion of Mo in Ni. At long ageing times the electrical resistivity reaches a constant value and the microhardness decreases as the precipitates coarsen and a discontinuous precipitation reaction takes place.

Keywords

Polymer Precipitation Electron Microscopy Transmission Electron Microscopy Activation Energy 
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 1993

Authors and Affiliations

  • Sang Yul Lee
    • 1
  • P. Nash
    • 1
  1. 1.Illinois Institute of TechnologyChicagoUSA

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