Annealing Behavior of FeNi Alloy Processed by High-Pressure Torsion

Seungwon Lee; Z. Horita

doi:10.4028/www.scientific.net/MSF.667-669.313

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HomeMaterials Science ForumMaterials Science Forum Vols. 667-669Annealing Behavior of FeNi Alloy Processed by...

Annealing Behavior of FeNi Alloy Processed by High-Pressure Torsion

Abstract:

An Fe-50at %Ni alloy was processed by high-pressure torsion (HPT) and annealed at lower homologous temperatures. Vickers microhardness and microstructural evolutions were examined with respect to the annealing time. Disks with 10 mm diameters having 0.85 mm thicknesses were subjected to HPT under a pressure of 6 GPa for 1-10 revolutions at a rotation speed of 1 rpm. The annealing after the HPT processing was conducted at homologous temperatures of ~0.3 for up to 40 days. The hardness increases with straining and saturates to a constant level of ~400 Hv at large equivalent strain. Microstructure analysis using XRD revealed that there was a peak corresponding to an α (Fe, Ni) phase.

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Periodical:

Materials Science Forum (Volumes 667-669)

Pages:

313-318

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.667-669.313

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Online since:

December 2010

Authors:

Seungwon Lee, Z. Horita

Keywords:

Annealing, Fe-Ni Alloy, High Pressure Torsion (HPT), TEM, X-Ray Diffraction (XRD)

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