Paper Title:

Nanostructured Materials by Twist Extrusion and High Pressure Torsion

Periodical Materials Science Forum (Volumes 584 - 586)
Main Theme Nanomaterials by Severe Plastic Deformation IV
Edited by Yuri Estrin and Hans Jürgen Maier
Pages 102-107
DOI 10.4028/www.scientific.net/MSF.584-586.102
Citation Viktor Varyukhin et al., 2008, Materials Science Forum, 584-586, 102
Online since June, 2008
Authors Viktor Varyukhin, Yan Beygelzimer, B. Efros
Keywords Nanostructure, High Pressure Torsion (HPT), Martensitic Transition, Severe Plastic Deformation (SPD), Twist Extrusion
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Abstract

Microstructures of Fe-Cr-Ni and Fe-Mn alloys subjected to severe plastic deformation under pressure have been studied by high pressure torsion and twist extrusion. This processes have similar deformation schemes, but very different pressure levels. The paper shows that this has a dramatic effect on the value of the residual high pressure e-phase in Fe-Mn alloys that underwent severe plastic deformation using these methods. Under roughly the same equivalent deformation of 5-6 units, the value of the residual e-phase in HPT with 20 GPa pressure reaches 100%. In TE with 1.5 GPa, it does not exceed 50%.