Ultra-Fine Grained Fe-32%Ni Alloy Processed by Multi-Axial Forging

Bao Jun Han

doi:10.4028/www.scientific.net/AMR.97-101.187

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 97-101Ultra-Fine Grained Fe-32%Ni Alloy Processed by...

Ultra-Fine Grained Fe-32%Ni Alloy Processed by Multi-Axial Forging

Abstract:

The Fe-32%Ni alloy was multi-axially forged at the temperature of 873K and strain rate of 10-2s-1, then the microstructure evolution in Fe-32%Ni alloy during deformation was investigated by the transmission electron microscopy (TEM). The results show that the grain size decreases with strain. The severe plastic deformed microstructure is characterized by the ultra-fine equiaxed grains and high internal stresses. The microstructure evolution mechanism is presented as the following: firstly, the dislocations accumulate as deformation bands in some directions with the progress of deformation; then the cellular structured subgrains are formed by continuous intersecting of deformation bands for the changing of strain path; eventually, the ultra-fine structured grains are formed by the subgrains rotation and the dislocations rearrangement.

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Periodical:

Advanced Materials Research (Volumes 97-101)

Pages:

187-190

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.97-101.187

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Online since:

March 2010

Authors:

Bao Jun Han

Keywords:

Fe-32%Ni Alloy, Grain Refinement, Multi-Axial Forging (MAF), Severe Plastic Deformation (SPD)

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