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An in Situ Experimental Study of Grain Growth in a Nanocrystalline Fe91Ni8Zr1 Alloy
Journal of Materials Science
  • Hasan Kotan, North Carolina State University
  • Kris A. Darling, U.S. Army Research Laboratory, Weapons and Materials Research Directorate, RDRL-WMM-F, Aberdeen Proving Ground
  • Mostafa Saber, Portland State University
  • Ronald O. Scattergood, North Carolina State University
  • Carl C. Koch, North Carolina State University
Document Type
Publication Date
  • Nanocrystals -- Research,
  • Nanocrystals -- Materials,
  • Grain growth in metals
Grain growth and microstructural evolution of thermally stabilized Fe91Ni8Zr1 were investigated by in situ and ex situ studies. Our investigations suggest that the microstructural evolution is fairly slow and the microstructure shows stabilization up to about 700 °C. Above this temperature, a certain fraction of grains grow abnormally into the nanocrystalline matrix, resulting in a bimodal microstructure and causing the complete loss of thermal stability. The reason for abnormal grain growth and the loss of thermal stability is identified as the appearance of the fcc γ-phase and consequent reduction in the total area of grain boundaries and the overall stored energy.

This work was authored as part of the Contributor's official duties as a Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.

*At the time of publication, Mostafa Saber was affiliated with North Carolina State University.

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Citation Information
Kotan, H., Darling, K. A., Saber, M., Scattergood, R. O., & Koch, C. C. (2013). An in situ experimental study of grain growth in a nanocrystalline Fe91Ni8Zr1 alloy. Journal of Materials Science, 48(5), 2251-2257.