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Mechanism of grain refinement and coarsening in undercooled Ni–Fe alloy

  • Tao Liang , Zheng Chen , Xiaoqin Yang , Ning Liu , Yanan Yang , Chenlong Duan and Yuemin Zhao
Published/Copyright: September 15, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 9

Abstract

The microstructural evolution of undercooled Ni-1 at.% Fe alloy was investigated by means of fluxing and cyclic superheating. Within the achieved undercoolings, there were two grain refinement processes and a grain coarsening process. The evolution mechanisms of the microstructure were studied applying the calculation of a stress accumulation model and dimensionless superheating. The first grain refinement can be ascribed to the dendrite break-up or ripening induced by remelting. The second one was caused by recrystallization induced by stress accumulation originating from the rapid solidification.

Keywords: Ni–Fe alloy; Undercooling; Grain refinement; Recrystallization
* Correspondence address, Associate Professor Zheng Chen, School of Material Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, P.R. China, Tel.: +86-0516-83897715, Fax: +86-0516-83591870, E-mail:

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Received: 2014-01-17
Accepted: 2014-03-24
Published Online: 2014-09-15
Published in Print: 2014-09-15

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111097
Keywords for this article
Ni–Fe alloy; Undercooling; Grain refinement; Recrystallization

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Diffusivities and atomic mobilities of an Sn–Ag–Bi–Cu–Pb melt
  5. Experimental study of the phase relations in the Fe–Cr–Si ternary system at 700°C
  6. Effect of molybdenum on the microstructure, mechanical properties and corrosion behavior of Ti alloys
  7. Mechanism of grain refinement and coarsening in undercooled Ni–Fe alloy
  8. Effects of copper content and liquid separation on the microstructure formation of Co–Cu immiscible alloys
  9. Influence of the solidification temperature range on Gasar structures made from Cu–Mn alloys
  10. Effect of ageing time on mechanical properties and tribological behaviour of aluminium hybrid composite
  11. Microstructure and tensile properties of a friction stir welded Al–Mg–Si alloy
  12. Lüders effect in Al 99.7% extruded via the KoBo method
  13. Reduced graphene oxide nanocomposites with different diameters and crystallinity of TiO2 nanoparticles – synthesis, characterization and photocatalytic activity
  14. Constitutive modelling of mill loads during hot rolling of AISI 321 austenitic stainless steel
  15. X-ray stress measurement with two-dimensional detector based on Fourier analysis
  16. People
  17. People
  18. People
  19. DGM News
  20. Personal
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